feat: Add Packet Log Screen for BLE packet logging and exporting

- Implemented PacketLogScreen to display and filter BLE packet logs.
- Added functionality to export logs as CSV and text files.
- Introduced clipboard copy feature for hex data.
- Implemented clear logs functionality with confirmation dialog.
- Enhanced MeshCoreBleService to log TX and RX packets with descriptions.
- Added BufferReader methods for reading unsigned and signed 16-bit integers (big-endian).
- Updated CayenneLppParser to read values as big-endian.
- Created MessageStorageService for persisting messages to local storage.
- Enhanced map markers to display telemetry data including voltage, humidity, and pressure.

.claude/settings.local.json

@@ -13,7 +13,9 @@
       "Bash(flutter pub get:*)",
       "Bash(flutter run:*)",
       "Bash(nc:*)",
-      "Bash(pkill:*)"
+      "Bash(pkill:*)",
+      "WebFetch(domain:github.com)",
+      "WebFetch(domain:raw.githubusercontent.com)"
     ],
     "deny": [],
     "ask": []