feat: Add Paarrot API server with endpoints for controlling app features

- Implemented API server using Express, including endpoints for health check, status, mute, deafen, channel management, and message sending.
- Added middleware for CORS and JSON body parsing.
- Created test scripts (Node.js and Bash) for API endpoint verification.
- Documented API usage and integration in new API documentation files.
- Updated package.json to include necessary dependencies (express, cors, body-parser).

test-api.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+# Paarrot API Quick Test Script
+# 
+# Simple curl commands to test the API endpoints
+# Make sure Paarrot is running before using these commands
+
+API_BASE="http://127.0.0.1:33384"
+
+echo "🚀 Paarrot API Quick Test"
+echo ""
+
+# Health check
+echo "📡 Health Check:"
+curl -s "$API_BASE/health" | jq '.' || curl -s "$API_BASE/health"
+echo ""
+echo ""
+
+# Get status
+echo "📊 Get Status:"
+curl -s "$API_BASE/status" | jq '.' || curl -s "$API_BASE/status"
+echo ""
+echo ""
+
+# Toggle mute
+echo "🎤 Toggle Mute:"
+curl -s -X POST "$API_BASE/mute/toggle" | jq '.' || curl -s -X POST "$API_BASE/mute/toggle"
+echo ""
+echo ""
+
+# Toggle deafen
+echo "🔇 Toggle Deafen:"
+curl -s -X POST "$API_BASE/deafen/toggle" | jq '.' || curl -s -X POST "$API_BASE/deafen/toggle"
+echo ""
+echo ""
+
+# Get channels
+echo "📋 Get Channels:"
+curl -s "$API_BASE/channels" | jq '.' || curl -s "$API_BASE/channels"
+echo ""
+echo ""
+
+# Get current room
+echo "🏠 Get Current Room:"
+curl -s "$API_BASE/room/current" | jq '.' || curl -s "$API_BASE/room/current"
+echo ""
+echo ""
+
+echo "✨ Done!"
+echo ""
+echo "💡 Tips:"
+echo "  - Use 'jq' for pretty JSON output (install with: sudo apt install jq)"
+echo "  - Check API.md for full documentation"
+echo "  - Test message sending: curl -X POST $API_BASE/message/current -H 'Content-Type: application/json' -d '{\"message\": \"Hello!\"}'"