Add active buzzer test with SoftSPI touch and LVGL.

GPIO22 digital on/off toggle (default off) and flashable firmware/cyd package.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitignore

@@ -0,0 +1,13 @@
+.pio/
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch
+*.pyc
+__pycache__/
+.DS_Store
+Thumbs.db
+assets/
+*.elf
+# 构建目录里的 bin 不入库；firmware/ 预编译包要入库
+!firmware/**/*.bin