P4 voice panel

Bundles voice_assistant/ firmware plus .vscode/.cursor configs and example.code.

Treat this as companion UI work to p4 chatbot 83125/ unless you refactor modules.

Recommended flow:

cd voice_assistant

Follow manifests inside (CMakeLists.txt, sdkconfig.defaults, Arduino project files, etc.—whichever framework that folder uses). Keep generated build/ / .pio/ directories excluded from commits.