Add Android control app and embedded server

Inspired by HNKServer/honoka-chan-apk-server, but implemented as a JNI-based embedded runtime instead of the original approach.

- Add an Android Compose controller app that starts and stops honoka-chan through JNI, shows runtime and health status, manages data directory mounting, and supports backup import/export for data.db
- Add an embeddable Go server entrypoint plus JNI-exported status, health, and reload hooks so desktop and Android builds share the same startup and shutdown path
- Add Android build scripts, runtime packaging, and project documentation, including generated default config.json content for honoka_runtime.zip
- Add runtime bundle hash tracking so updated honoka_runtime.zip assets are automatically redeployed while preserving config.json and user data files
- Add in-app service settings for unlock_all_special_rotation with immediate config persistence and automatic reload when the service is running
- Split SQLite driver selection by platform, using go-sqlite3 on Android and modernc.org/sqlite elsewhere to avoid Android x86_64 seccomp crashes
- Update startup, database initialization, and system health/reload handlers to support the embedded runtime and Android control flow

Signed-off-by: Sean Du <do4suki@gmail.com>

docs/04-testing.md

@@ -7,6 +7,7 @@
 第一次启动 `honoka-chan` 后会生成 `config.json`。需要确认：
 
 - `settings.cdn_server` 指向你的数据下载地址
+- `settings.reload_token` 可选；如果需要通过接口热重载 `config.json`，需要先设置一个 token
 - `settings.unlock_all_special_rotation` 可选；设为 `true` 后会忽略日替时间限制，直接解锁全部日替特殊歌曲，不包含周替 `MASTER`
 - 如果数据直接放在本项目的 `static` 目录下，通常可以配置成类似 `http://192.168.1.123/static`
 
@@ -25,6 +26,9 @@
 
 ## 补充说明
 
+- `GET /system/health` 可用于检查应用和数据库是否正常运行
+- `POST /system/reload?token=你的token` 可在修改 `config.json` 后重新加载配置
+
 SIF 的“全量数据下载”实际上并不是真正的全量。部分剧情资源仍然需要通过 `/download/getUrl` 接口按路径拉取。
 
 所以除了 `archives` 目录里的压缩包，还需要另外维护一份：