Update GPS diagnostics and improve update speed

[yellowcooln]

Summary

This PR improves GPS support in the pyMC Repeater Home Assistant integration using the newer repeater GPS API introduced in pyMC_Repeater dev (e4efc80).

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What Changed

Expanded GPS Diagnostics

• Increased GPS diagnostics coverage using /api/gps
• Added new GPS entities for:
  • Enabled / running / stale state
  • Geoid separation
  • Course
  • Magnetic variation
  • PDOP / VDOP
  • GPS UTC time
  • Location update state
  • Checksum counters
  • Last sentence type

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Richer GPS Attributes

Added expanded GPS attributes covering:

• Source / configuration
• Location update metadata
• NMEA sentence counters
• Recent sentences
• Raw GPS attributes

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GPS Live Streaming Support

• Added GPS SSE support using /api/gps_stream
• GPS entities now update from the live stream instead of waiting for the normal 60-second coordinator poll
• Non-GPS entities continue using the standard polling path

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Version

• Bumped integration version to 1.0.2

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Result

GPS entities in Home Assistant now:

• Update significantly faster
• Expose substantially more repeater GPS diagnostics
• Maintain existing behavior for the rest of the integration