feat: convert ssh tunnels into a plugin

src/backend/database/database.ts

@@ -10,7 +10,6 @@ import hostRoutes from "./routes/host.js";
 import alertRoutes from "./routes/alerts.js";
 import credentialsRoutes from "./routes/credentials.js";
 import sshAuthRoutes from "./routes/ssh-auth-routes.js";
-import c2sTunnelPresetRoutes from "./routes/c2s-tunnel-presets.js";
 import terminalRoutes from "./routes/terminal.js";
 import sessionLogRoutes from "./routes/session-log-routes.js";
 import sessionSharingRoutes from "../hosts/session-sharing/routes.js";
@@ -1809,7 +1808,6 @@ app.use("/host", hostRoutes);
 app.use("/alerts", alertRoutes);
 app.use("/credentials", credentialsRoutes);
 app.use("/ssh-auth", sshAuthRoutes);
-app.use("/c2s-tunnel-presets", c2sTunnelPresetRoutes);
 app.use("/terminal", terminalRoutes);
 app.use("/session_logs", sessionLogRoutes);
 app.use("/session-sharing", sessionSharingRoutes);