chore: resolve undefined-field warnings, fix link git statuses, rewrite devicons (#2968)

* add todo

* refactor(#2886): multi instance: node class refactoring: extract links, *_git_status (#2944)

* extract DirectoryLinkNode and FileLinkNode, move Node methods to children

* temporarily move DirectoryNode methods into BaseNode for easier reviewing

* move mostly unchanged DirectoryNode methods back to BaseNode

* tidy

* git.git_status_file takes an array

* update git status of links

* luacheck hack

* safer git_status_dir

* refactor(#2886): multi instance: node class refactoring: DirectoryNode:expand_or_collapse (#2957)

move expand_or_collapse to DirectoryNode

* refactor(#2886): multi instance: node group functions refactoring (#2959)

* move last_group_node to DirectoryNode

* move add BaseNode:as and more doc

* revert parameter name changes

* revert parameter name changes

* add Class

* move group methods into DN

* tidy group methods

* tidy group methods

* tidy group methods

* tidy group methods

* parent is DirectoryNode

* tidy expand all

* BaseNode -> Node

* move watcher to DirectoryNode

* last_group_node is DirectoryNode only

* simplify create-file

* simplify parent

* simplify collapse-all

* simplify live-filter

* style

* move lib.get_cursor_position to Explorer

* move lib.get_node_at_cursor to Explorer

* move lib.get_nodes to Explorer

* move place_cursor_on_node to Explorer

* resolve resource leak in purge_all_state

* move many autocommands into Explorer

* post merge tidy

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* Revert "chore: resolve undefined-field"

This reverts commit be546ff18d41f28466b065c857e1e041659bd2c8.

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* Revert "chore: resolve undefined-field"

This reverts commit e82db1c44d.

* chore: resolve undefined-field

* chore: class new is now generic

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* Revert "chore: resolve undefined-field"

This reverts commit 0e9b844d22.

* move icon builders into node classes

* move icon builders into node classes

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* chore: resolve undefined-field

* move folder specifics from icons to Directory

* move folder specifics from icons to Directory

* move folder specifics from icons to Directory

* move folder specifics from icons to Directory

* move file specifics from icons to File

* clean up sorters

* chore: resolve undefined-field

* tidy hl icon name

* file devicon uses library to fall back

* file devicon uses library to fall back

* file devicon uses library to fall back

lua/nvim-tree/explorer/sorters.lua

@@ -1,16 +1,32 @@
+local Class = require("nvim-tree.class")
+local DirectoryNode = require("nvim-tree.node.directory")
+
 local C = {}
 
----@class Sorter
-local Sorter = {}
+---@class (exact) SorterCfg
+---@field sorter string|fun(nodes: Node[])
+---@field folders_first boolean
+---@field files_first boolean
 
-function Sorter:new(opts)
-  local o = {}
-  setmetatable(o, self)
-  self.__index = self
-  o.config = vim.deepcopy(opts.sort)
+---@class (exact) Sorter: Class
+---@field cfg SorterCfg
+---@field user fun(nodes: Node[])?
+---@field pre string?
+local Sorter = Class:new()
 
-  if type(o.config.sorter) == "function" then
-    o.user = o.config.sorter
+---@param opts table user options
+---@return Sorter
+function Sorter:create(opts)
+  ---@type Sorter
+  local o = {
+    cfg = vim.deepcopy(opts.sort),
+  }
+  o = self:new(o)
+
+  if type(o.cfg.sorter) == "function" then
+    o.user = o.cfg.sorter --[[@as fun(nodes: Node[])]]
+  elseif type(o.cfg.sorter) == "string" then
+    o.pre = o.cfg.sorter --[[@as string]]
   end
   return o
 end
@@ -20,7 +36,7 @@ end
 ---@return fun(a: Node, b: Node): boolean
 function Sorter:get_comparator(sorter)
   return function(a, b)
-    return (C[sorter] or C.name)(a, b, self.config)
+    return (C[sorter] or C.name)(a, b, self.cfg)
   end
 end
 
@@ -41,17 +57,17 @@ end
 ---Evaluate `sort.folders_first` and `sort.files_first`
 ---@param a Node
 ---@param b Node
----@param cfg table
+---@param cfg SorterCfg
 ---@return boolean|nil
 local function folders_or_files_first(a, b, cfg)
   if not (cfg.folders_first or cfg.files_first) then
     return
   end
 
-  if not a.nodes and b.nodes then
+  if not a:is(DirectoryNode) and b:is(DirectoryNode) then
     -- file <> folder
     return cfg.files_first
-  elseif a.nodes and not b.nodes then
+  elseif a:is(DirectoryNode) and not b:is(DirectoryNode) then
     -- folder <> file
     return not cfg.files_first
   end
@@ -157,15 +173,15 @@ function Sorter:sort(t)
     end
 
     split_merge(t, 1, #t, mini_comparator) -- sort by user order
-  else
-    split_merge(t, 1, #t, self:get_comparator(self.config.sorter))
+  elseif self.pre then
+    split_merge(t, 1, #t, self:get_comparator(self.pre))
   end
 end
 
 ---@param a Node
 ---@param b Node
 ---@param ignorecase boolean|nil
----@param cfg table
+---@param cfg SorterCfg
 ---@return boolean
 local function node_comparator_name_ignorecase_or_not(a, b, ignorecase, cfg)
   if not (a and b) then