feat: ESP32-S3 双核并行摄像头系统 (AsyncUDP + ESP-NOW)

- 主程序: src/main.cpp - AP模式摄像头推流 + AsyncUDP中断通讯
- 通信模块: UDPPeer类 (UDP + ESP-NOW双通道, Flash配置持久化)
- 参考实现: ESPNOW通讯 / bkespnow版本 / 普通连接版本
- clangd配置: --target=arm-none-eabi + __XTENSA__宏 + 工具链sys-include
- 硬件: ESP32-S3-WROOM-1-N16R8 + OV2640, 16MB Flash, Octal PSRAM

jxbeye/lib/README

@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into the executable file.
+
+The source code of each library should be placed in a separate directory
+("lib/your_library_name/[Code]").
+
+For example, see the structure of the following example libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional. for custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+Example contents of `src/main.c` using Foo and Bar:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+The PlatformIO Library Dependency Finder will find automatically dependent
+libraries by scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html