feat(metrics): 初步增加获取运行指标的功能(兼容 Prometheus).

添加兼容 Prometheus 的运行指标收集导出功能, 通过内置 HttpServer 将其导出.
默认关闭.

scalabot-app/build.gradle.kts

@@ -23,6 +23,9 @@ dependencies {
     implementation("org.telegram:telegrambots-abilities:5.6.0")
     implementation("org.telegram:telegrambots:5.6.0")
 
+    implementation("io.prometheus:simpleclient:0.15.0")
+    implementation("io.prometheus:simpleclient_httpserver:0.15.0")
+
     testImplementation(kotlin("test"))
 }