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/finders/search-node.lua

@@ -4,6 +4,9 @@ local find_file = require("nvim-tree.actions.finders.find-file").fn
 
 local M = {}
 
+---@param search_dir string|nil
+---@param input_path string
+---@return string|nil
 local function search(search_dir, input_path)
   local realpaths_searched = {}
 
@@ -11,6 +14,8 @@ local function search(search_dir, input_path)
     return
   end
 
+  ---@param dir string
+  ---@return string|nil
   local function iter(dir)
     local realpath, path, name, stat, handle, _