[LuaDoc] Mark filesystem.asset_type as an enumerator

data/lua/core/filesystem.lua

@@ -2,6 +2,7 @@
 --[========[File Handling]========]
 print("Loading filesystem module...")
 
+---@enum asset_type
 ---Valid asset types, used as the type argument for have_asset and resolve_asset
 filesystem.asset_type = {
     IMAGE = 'images',

utils/emmylua/filesystem.lua

@@ -28,13 +28,13 @@ function filesystem.canonical_path(path) end
 function filesystem.image_size(path) end
 
 ---Check if an asset exists in the current binary path
----@param type string
+---@param type asset_type
 ---@param path string
 ---@return boolean
 function filesystem.have_asset(type, path) end
 
 ---Resolve an asset path against the current binary path
----@param type string
+---@param type asset_type
 ---@param path string
 ---@return string
 function filesystem.resolve_asset(type, path) end