Rename project references from Pixel View to ADS-Bit

Rename pixel-view.js to ads-bit.js, rename PixelADSB class to ADSBit,
and update all documentation and code comments to use ADS-Bit branding
consistently throughout the project.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Pixel ADS-B Server - Connects directly to ADS-B receivers"""
+"""ADS-Bit Server - Connects directly to ADS-B receivers"""
 import asyncio
 import socket
 import json
@@ -833,7 +833,7 @@ async def main():
     """Main entry point"""
     global receivers, receiver_tasks
 
-    print("Pixel ADS-B Server Starting...")
+    print("ADS-Bit Server Starting...")
 
     load_config()