Major cleanup and add toml configuration

overlay.toml.example

@@ -0,0 +1,20 @@
+# Copy to overlay.toml (gitignored) and adjust for your machine.
+
+# Absolute path to Beat Saber Plus ChatRequest Database.json (optional if ChatRequest.json is in the repo)
+chat_request_database = "C:\\path\\to\\UserData\\BeatSaberPlus\\ChatRequest\\Database.json"
+
+# BeatLeader Steam / platform id for friend scores (recommended)
+beatleader_player_id = "76561199407393962"
+
+# UI toggles (optional; URL hash still overrides when present)
+cover = true
+map_info = true
+time = true
+score = true
+friends = true
+friend_mode = "mutual" # mutual | following | followers
+bsr = false
+right = false
+bottom = true
+scale = 1.0
+fade = 300