Initial commit: ESP32-S3 UWB positioning system

- Added anchor and tag implementations for MaUWB modules
- Configured for 6.8Mbps communication with range filtering
- Support for multiple tags (tag/tag2 environments)
- OLED display integration for real-time measurements
- Simplified code without sleep mode and OTA functionality
- Complete UWBHelper library for AT command interface

.gitignore

@@ -0,0 +1,30 @@
+# PlatformIO
+.pio/
+.vscode/
+.pioenvs/
+.piolibdeps/
+.clang_complete
+.gcc-flags.json
+
+# Build artifacts
+*.bin
+*.elf
+*.map
+
+# IDE files
+.vscode/
+*.code-workspace
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+
+# Temporary files
+*.tmp
+*.temp
+
+#Claude code
+.Claude