Initial sanitized SmartSpeaker snapshot

.gitignore

@@ -0,0 +1,23 @@
+# ESP-IDF Build & Config
+build/
+sdkconfig.old
+dependencies.lock
+managed_components/
+releases/*.bin
+
+# Secrets and Generated Configuration Headers
+wifi-credentials
+main/wifi_credentials.h
+
+# Node.js / dev-server
+dev-server/node_modules/
+monitor-server/node_modules/
+dev-server/dist/
+dev-server/package-lock.json
+
+# Local IDE and System Files
+.vscode/
+.idea/
+*.log
+Thumbs.db
+.DS_Store