feat: 微信 AI 助手插件（wechat-ai）基线

- 移除旧 aitest 与 mobile-ui-auto 插件及其资源、测试
- 新增纯 Java 微信 AI 助手插件（ADB 驱动 + AI 回复）
- 同步更新主界面图标映射、主题样式与插件配置

.gitignore

@@ -0,0 +1,50 @@
+# === 构建产物 ===
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+/dist/
+
+# === 运行时数据文件 ===
+/data/
+/logs/
+/export/
+build.log
+
+# === 空模板目录保护 ===
+!/src/main/resources/config/
+
+# === IDE ===
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+/.workbuddy/
+/.codefree/
+/.workbuddy/
+/scripts/
+/.codebuddy/*.json
+/.worktrees/