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/root/change-dir.lua

@@ -6,9 +6,15 @@ local M = {
   current_tab = vim.api.nvim_get_current_tabpage(),
 }
 
+---@param name string
+---@return string|nil
 local function clean_input_cwd(name)
   name = vim.fn.fnameescape(name)
-  local root_parent_cwd = vim.fn.fnamemodify(utils.path_remove_trailing(core.get_cwd()), ":h")
+  local cwd = core.get_cwd()
+  if cwd == nil then
+    return
+  end
+  local root_parent_cwd = vim.fn.fnamemodify(utils.path_remove_trailing(cwd), ":h")
   if name == ".." and root_parent_cwd then
     return vim.fn.expand(root_parent_cwd)
   else
@@ -16,17 +22,23 @@ local function clean_input_cwd(name)
   end
 end
 
+---@param new_tabpage integer
+---@return boolean
 local function is_window_event(new_tabpage)
   local is_event_scope_window = vim.v.event.scope == "window" or vim.v.event.changed_window
   return is_event_scope_window and new_tabpage == M.current_tab
 end
 
+---@param foldername string
+---@return boolean
 local function prevent_cwd_change(foldername)
   local is_same_cwd = foldername == core.get_cwd()
   local is_restricted_above = M.options.restrict_above_cwd and foldername < vim.fn.getcwd(-1, -1)
   return is_same_cwd or is_restricted_above
 end
 
+---@param input_cwd string
+---@param with_open boolean|nil
 function M.fn(input_cwd, with_open)
   if not core.get_explorer() then
     return
@@ -38,7 +50,7 @@ function M.fn(input_cwd, with_open)
   end
 
   local foldername = clean_input_cwd(input_cwd)
-  if prevent_cwd_change(foldername) then
+  if foldername == nil or prevent_cwd_change(foldername) then
     return
   end
 
@@ -46,14 +58,19 @@ function M.fn(input_cwd, with_open)
   M.force_dirchange(foldername, with_open)
 end
 
+---@param global boolean
+---@param path string
 local function cd(global, path)
   vim.cmd((global and "cd " or "lcd ") .. vim.fn.fnameescape(path))
 end
 
+---@return boolean
 local function should_change_dir()
   return M.options.enable and vim.tbl_isempty(vim.v.event)
 end
 
+---@param f function
+---@return fun(foldername: string, should_open_view: boolean|nil)
 local function add_profiling_to(f)
   return function(foldername, should_open_view)
     local profile = log.profile_start("change dir %s", foldername)