refactor: clean up unused variables and improve .gitignore entries

.gitignore

@@ -1,8 +1,41 @@
 .pio
-.vscode/.browse.c_cpp.db*
+.vscode/
+.aider*
+.DS_Store
+._*
+**/.DS_Store
+**/.Spotlight-V100
+**/.Trashes
+**/.fseventsd
+.AppleDouble
+**/.DS_Store
+**/.Spotlight-V100
+**/.Trashes
+**/.fseventsd
+.AppleDouble
+.aider.chat.history.md
+.aider.input.history
+.DS_Store
+.gitignore
+.aider.tags.cache.v3/cache.db
+.aider.tags.cache.v3/cache.db-shm
+.aider.tags.cache.v3/cache.db-wal
 .vscode/c_cpp_properties.json
 .vscode/launch.json
 .vscode/ipch
 .vscode/extensions.json
-.vscode/settings.json
-data
+.vscode/launch.json
+include/README
+lib/README
+test/README
+.aider*
+data/*
+!data/
+!data/.gitkeep
+html/bambu_credentials.json
+html/spoolman_url.json
+_local/*
+website/*
+release.sh
+.github/copilot-instructions.md
+data