typechecked optargs constructors for nodes

lua/nvim-tree/node/link.lua

@@ -5,4 +5,17 @@ local Object = require("nvim-tree.classic")
 ---@field protected fs_stat_target uv.fs_stat.result
 local LinkNode = Object:extend()
 
+---@class (exact) LinkNodeArgs: NodeArgs
+---@field link_to string
+---@field fs_stat_target uv.fs_stat.result
+---
+---@protected
+---@param args LinkNodeArgs
+function LinkNode:new(args)
+  LinkNode.super.new(self, args)
+
+  self.link_to = args.link_to
+  self.fs_stat_target = args.fs_stat_target
+end
+
 return LinkNode