Add multi-theme system with random theme selection on app startup

.gitignore

@@ -0,0 +1,42 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# private key and sensitive files
+keystore.properties
+upload-keystore.properties
+upload-keystore.jks
+*.jks
+*.pem
+*.p12
+*.pfx
+.env*
+*.key
+
+# Tauri build artifacts and generated files
+src-tauri/gen/
+src-tauri/target/
+src-tauri/.gradle/
+*.apk
+*.aab