linter fixes

.luacheckrc

@@ -0,0 +1,44 @@
+-- .luacheckrc
+-- Configuration for luacheck
+
+globals = {
+  "Util",
+  "DesitionManager",
+  "ScreenManager",
+  "UI",
+  "Print",
+  "Input",
+  "Audio",
+  "Context",
+  "mset",
+  "mget",
+  "btnp",
+  "keyp",
+  "music",
+  "sfx",
+  "rect",
+  "rectb",
+  "circ",
+  "circb",
+  "cls",
+  "tri",
+  "Songs",
+  "frame_from_beat",
+  "beats_to_pattern",
+  "MapBedroom",
+  "TIC",
+  "exit",
+  "trace",
+  "index_menu",
+}
+
+
+
+-- Exclude certain warnings globally
+exclude_warnings = {
+    "undefined_global", -- Will be covered by 'globals' table
+    "redefined_loop_variable", -- Common in Lua for iterators
+}
+
+-- Options for unused variables
+std = "lua51" -- Assuming Lua 5.1, common for TIC-80