feat: 集成 Jetpack Compose UI 并重构配置界面

- 添加 Jetpack Compose 依赖和编译器插件
- 重构 MainActivity 为 Compose UI 实现
- 新增配置界面，支持服务器地址输入和保存
- 添加开始/停止推流控制按钮
- 改进 WebRTC 客户端生命周期管理

gradle/libs.versions.toml

@@ -1,5 +1,11 @@
 [versions]
 agp = "9.2.1"
+kotlin = "2.0.0"
+composeBom = "2024.02.00"
+composeCompiler = "1.5.8"
+activityCompose = "1.8.2"
+coreKtx = "1.12.0"
+lifecycleRuntimeKtx = "2.7.0"
 junit = "4.13.2"
 junitVersion = "1.1.5"
 espressoCore = "3.5.1"
@@ -12,7 +18,18 @@ ext-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitV
 espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
 appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "appcompat" }
 material = { group = "com.google.android.material", name = "material", version.ref = "material" }
+androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
+androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
+androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
+androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
+androidx-compose-ui = { group = "androidx.compose.ui", name = "ui" }
+androidx-compose-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
+androidx-compose-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
+androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
+androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }
+jetbrains-kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
+compose-compiler = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }