Add MCP servers and custom tools for bots

Two new settings pages, MCPs and Tools. Super admins define them; super
admins and admins attach them to bots, to workspaces (every bot there),
or to every bot. Bots get them in chat replies and tasks.

- Custom tools: a JSON-schema of arguments plus an HTTP request, a script
  on the bot's computer, or a prompt, templated with {{args.x}} and
  {{env.KEY}}, secrets redacted from results.
- MCP servers: remote (URL and headers) or stdio commands run on the host
  with a setup command and an isolated env, in a per-process pool. Tools
  are listed into a cache and connect on first call.
- Add, edit, access and try open in modals.
- Markdown, JSON and command fields use twui's AceEditor (CodeEditor),
  its scripts loaded on demand.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/cron/index.ts

@@ -3,6 +3,7 @@ import cronHeartbeat from "./heartbeat";
 import pruneBotsQueue from "./prune-bots-queue";
 import cronSyncHarnessModels from "./sync-harness-models";
 import syncComputers from "./sync-computers";
+import syncMcpServers from "./sync-mcp-servers";
 import runCronJobs from "./run-cron-jobs";
 import registerCronJob from "./register-cron-job";
 
@@ -40,6 +41,12 @@ export default function cron() {
         run_on_start: true,
     });
 
+    registerCronJob({
+        title: "sync-mcp-servers",
+        schedule: "@hourly",
+        task: syncMcpServers,
+    });
+
     registerCronJob({
         title: "run-cron-jobs",
         schedule: "* * * * *",