Redesign plugins UI and demo raw + high-level hooks

- Match exteraGram-style card layout with master toggle and plugin actions
- Add usage manifest field, pin/delete/removePlugin engine APIs
- Hello World plugin hooks Logger.d (raw) and send pipeline (high-level)
- Bundle updated hello_world.fcplugin; stop debug auto-enable

Co-authored-by: denis0001-dev <denis0001.dev@ya.ru>

plugins/sample-hello/build.gradle.kts

@@ -35,9 +35,10 @@ tasks.register("packageFcPlugin") {
             {
               "id": "hello_world",
               "name": "Hello World",
-              "description": "Rewrites .hello commands into a friendly greeting",
+              "description": "Demonstrates high-level send hooks and raw Logger.d hooks.",
               "author": "FromChat",
-              "version": "1.0.0",
+              "version": "1.0.1",
+              "usage": "Send .hello Name in any chat to rewrite the message. Raw hook shows a bulletin when a message is queued for sending.",
               "app_version": ">=1.0.0",
               "sdk_version": ">=1.0.0",
               "entry_class": "ru.fromchat.plugins.sample.hello.HelloWorldPlugin",

plugins/sample-hello/src/main/kotlin/ru/fromchat/plugins/sample/hello/HelloWorldPlugin.kt

@@ -13,6 +13,17 @@ class HelloWorldPlugin : BasePlugin() {
         addOnSendMessageHook { context ->
             onSendMessage(context)
         }
+        hookShared(
+            hookId = "logger.debug",
+            after = { args, _ ->
+                val tag = args.getOrNull(0) as? String ?: return@hookShared HookResult()
+                val message = args.getOrNull(1) as? String ?: return@hookShared HookResult()
+                if (tag == "OutgoingMessageCoordinator" && message.contains("enqueue")) {
+                    showBulletin("Raw hook: intercepted outgoing message pipeline")
+                }
+                HookResult()
+            },
+        )
     }
 
     override fun createSettings(): List<PluginSetting> = listOf(
@@ -36,6 +47,7 @@ class HelloWorldPlugin : BasePlugin() {
         val name = parts.getOrNull(1)?.trim().orEmpty().ifEmpty { "World" }
         val template = getSettingString("template", "Hello, {name}!")
         context.text = template.replace("{name}", name)
+        showBulletin("High-level hook: rewrote .hello command")
         return HookResult(strategy = HookStrategy.MODIFY, value = context)
     }
 }