chore: add type annotations and resolve LSP warnings (#2555)

* chore: add type annotations to (almost) all functions

* stylua

* Add classes for symlink nodes

* Replace deprecated `@vararg`

* Move node classes to `node` module

* Fix `Symlink*` classes

* add vim and libuv runtime for luals, qualify libuv types

* add scripts/luals-check, not quite ready for CI

* additional nil checks for git/init.lua and git/runner.lua

* additional nil checks for nvim-tree.lua

* wrap vim.cmd-as-a-function calls inside functions

* vim.tbl_filter predicate returns booleans

* Revert "add scripts/luals-check, not quite ready for CI"

This reverts commit c70229cad9.

* Add `MinimalNode` class in `marks` module

* Fix various LSP warnings

* stylua

* Fix `Explorer` class, update related annotations and add necessary checks

* Add missing annotations to `live-filter`

* Add temporary aliases for `uv.*` types

* Resolve remaining LSP warnings

* Revert changes not related to internal types

* Minor adjustments

* Update doc comments style

* Minor adjustments (pt. 2)

---------

Co-authored-by: Alexander Courtis <alex@courtis.org>

lua/nvim-tree/actions/fs/rename-file.lua

@@ -20,6 +20,8 @@ local function err_fmt(from, to, reason)
   return string.format("Cannot rename %s -> %s: %s", from, to, reason)
 end
 
+---@param node Node
+---@param to string
 function M.rename(node, to)
   local notify_from = notify.render_path(node.absolute_path)
   local notify_to = notify.render_path(to)
@@ -32,13 +34,16 @@ function M.rename(node, to)
   events._dispatch_will_rename_node(node.absolute_path, to)
   local success, err = vim.loop.fs_rename(node.absolute_path, to)
   if not success then
-    return notify.warn(err_fmt(notify_from, notify_to, err))
+    notify.warn(err_fmt(notify_from, notify_to, err))
+    return
   end
   notify.info(string.format("%s -> %s", notify_from, notify_to))
   utils.rename_loaded_buffers(node.absolute_path, to)
   events._dispatch_node_renamed(node.absolute_path, to)
 end
 
+---@param default_modifier string|nil
+---@return fun(node: Node, modifier: string)
 function M.fn(default_modifier)
   default_modifier = default_modifier or ":t"
 
@@ -47,13 +52,18 @@ function M.fn(default_modifier)
       node = lib.get_node_at_cursor()
     end
 
+    if node == nil then
+      return
+    end
+
     if type(modifier) ~= "string" then
       modifier = default_modifier
     end
 
     -- support for only specific modifiers have been implemented
     if not ALLOWED_MODIFIERS[modifier] then
-      return notify.warn("Modifier " .. vim.inspect(modifier) .. " is not in allowed list : " .. table.concat(ALLOWED_MODIFIERS, ","))
+      notify.warn("Modifier " .. vim.inspect(modifier) .. " is not in allowed list : " .. table.concat(ALLOWED_MODIFIERS, ","))
+      return
     end
 
     node = lib.get_last_group_node(node)