feat: convert ssh tunnels into a plugin

vite.config.ts

@@ -14,7 +14,7 @@ const useHTTPS = process.env.VITE_HTTPS === "true" && hasSSL;
 // Plugins no longer own ports: their HTTP and WebSocket traffic rides 30001
 // under /plugin-api and /plugin-ws. What is left is core servers that have not
 // moved yet.
-const apiProxyPorts = [30001, 30003, 30004, 30006, 30010, 30011, 30012];
+const apiProxyPorts = [30001, 30004, 30006, 30010, 30011, 30012];
 const apiProxy = Object.fromEntries(
   apiProxyPorts.map((port) => [
     `/__termix_api/${port}`,