feat(emmy): add emmylua annotations

lua/nvim-treesitter/parsers.lua

@@ -20,6 +20,22 @@ local filetype_to_parsername = {
   cs = "c_sharp",
 }
 
+---@class InstallInfo
+---@field url string
+---@field branch string|nil
+---@field revision string|nil
+---@field files string[]
+---@field generate_requires_npm boolean|nil
+---@field requires_generate_from_grammar boolean|nil
+---@field location string|nil
+
+---@class ParserInfo
+---@field install_info InstallInfo
+---@field filetype string
+---@field maintainers string[]
+---@field experimental boolean|nil
+
+---@type ParserInfo[]
 local list = setmetatable({}, {
   __newindex = function(table, parsername, parserconfig)
     rawset(