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

platformio.ini

@@ -0,0 +1,65 @@
+; PlatformIO Project Configuration File
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed, etc.
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+
+[platformio]
+default_envs = anchor
+
+; Common configuration for both anchor and tag
+[env]
+platform = espressif32
+board = esp32-s3-devkitc-1
+framework = arduino
+monitor_speed = 115200
+monitor_filters = esp32_exception_decoder
+build_flags = 
+    -DCORE_DEBUG_LEVEL=3
+    -DARDUINO_USB_CDC_ON_BOOT=1
+
+; Library dependencies
+lib_deps = 
+    adafruit/Adafruit GFX Library@^1.11.7
+    adafruit/Adafruit SSD1306@^2.5.7
+    adafruit/Adafruit BusIO@^1.14.4
+    bblanchon/ArduinoJson@^6.21.3
+
+; Anchor device configuration
+[env:anchor]
+build_src_filter = +<*> -<main_tag.cpp>
+build_flags = 
+    ${env.build_flags}
+    -DDEVICE_TYPE_ANCHOR=1
+    -DUWB_INDEX=0
+    -DNETWORK_ID=1234
+
+; Tag device configuration  
+[env:tag]
+build_src_filter = +<*> -<main_anchor.cpp>
+build_flags = 
+    ${env.build_flags}
+    -DDEVICE_TYPE_TAG=1
+    -DUWB_INDEX=1
+    -DNETWORK_ID=1234
+
+; Tag device 2 (copy and modify UWB_INDEX for multiple tags)
+[env:tag2]
+build_src_filter = +<*> -<main_anchor.cpp>
+build_flags = 
+    ${env.build_flags}
+    -DDEVICE_TYPE_TAG=1
+    -DUWB_INDEX=2
+    -DNETWORK_ID=1234
+
+; Development environment with debugging
+[env:debug]
+build_src_filter = +<*> -<main_tag.cpp>
+build_flags = 
+    ${env.build_flags}
+    -DDEVICE_TYPE_ANCHOR=1
+    -DUWB_INDEX=0
+    -DNETWORK_ID=1234
+    -DDEBUG_ENABLED=1
+debug_tool = esp-prog
+debug_init_break = tbreak setup