feat: IRC — add first-class channel support

Adds IRC as a first-class channel with core config surfaces (schema/hints/dock), plugin auto-enable detection, routing/policy alignment, and docs/tests.

Co-authored-by: Vignesh <vigneshnatarajan92@gmail.com>

extensions/irc/src/runtime.ts

@@ -0,0 +1,14 @@
+import type { PluginRuntime } from "openclaw/plugin-sdk";
+
+let runtime: PluginRuntime | null = null;
+
+export function setIrcRuntime(next: PluginRuntime) {
+  runtime = next;
+}
+
+export function getIrcRuntime(): PluginRuntime {
+  if (!runtime) {
+    throw new Error("IRC runtime not initialized");
+  }
+  return runtime;
+}