feat: add auth extension points and one ssh connect pipeline

plugins/web-endpoint/src/backend/index.ts

@@ -1,7 +1,10 @@
 import type { PluginContext } from "@termix/plugin-sdk/backend";
+import { setPluginSsh } from "./ssh.js";
 import { startWebEndpointService, stopWebEndpointService } from "./routes.js";
 
 export async function activate(ctx: PluginContext) {
+  setPluginSsh(ctx.ssh);
+  ctx.disposables.add(() => setPluginSsh(null));
   startWebEndpointService(ctx.http.router());
   ctx.log.info("Web Endpoint routes mounted at /plugin-api/web-endpoint");
 }