feat: add Twenty CRM script (#1476)

- Add ct/twenty.sh with update function
- Add install/twenty-install.sh (Node.js 24, PostgreSQL 16, Redis)
- Add frontend/public/json/twenty.json metadata
- Builds from source: yarn + nx monorepo (server + frontend)
- Server on port 3000, worker as separate systemd service

frontend/public/json/twenty.json

@@ -0,0 +1,48 @@
+{
+    "name": "Twenty",
+    "slug": "twenty",
+    "categories": [
+        25
+    ],
+    "date_created": "2026-02-22",
+    "type": "ct",
+    "updateable": true,
+    "privileged": false,
+    "interface_port": 3000,
+    "documentation": "https://docs.twenty.com/",
+    "website": "https://twenty.com/",
+    "logo": "https://cdn.jsdelivr.net/gh/selfhst/icons@main/webp/twenty.webp",
+    "config_path": "/opt/twenty/.env",
+    "description": "Twenty is a modern open-source CRM platform that helps you manage customer relationships, track deals, and organize contacts with a clean and powerful interface.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/twenty.sh",
+            "resources": {
+                "cpu": 4,
+                "ram": 8192,
+                "hdd": 20,
+                "os": "Debian",
+                "version": "13"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": [
+        {
+            "text": "First visit will prompt you to create a workspace and admin account.",
+            "type": "info"
+        },
+        {
+            "text": "Building from source requires significant resources and takes 10-15 minutes.",
+            "type": "warning"
+        },
+        {
+            "text": "Update SERVER_URL in /opt/twenty/.env if accessing from a different hostname.",
+            "type": "info"
+        }
+    ]
+}