feat: add Monero and Liquid Network container support

- AppMetadata for monerod/monero and elementsd/liquid in docker_packages
- Marketplace entries with pinned images from trusted registries
- Monero: sethforprivacy/simple-monerod:v0.18.3.4
- Liquid: vulpemventures/elements:23.2.2

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/Marketplace.vue

@@ -1127,6 +1127,28 @@ function getCuratedAppList() {
       manifestUrl: undefined,
       repoUrl: 'https://teeminuszero.net',
       webUrl: 'https://teeminuszero.net'
+    },
+    {
+      id: 'monero',
+      title: 'Monero',
+      version: '0.18.3.4',
+      description: 'Run a Monero full node. Private cryptocurrency with ring signatures, stealth addresses, and confidential transactions.',
+      icon: '/assets/img/app-icons/monero.png',
+      author: 'Monero Project',
+      dockerImage: 'docker.io/sethforprivacy/simple-monerod:v0.18.3.4',
+      manifestUrl: undefined,
+      repoUrl: 'https://github.com/monero-project/monero'
+    },
+    {
+      id: 'liquid',
+      title: 'Liquid Network',
+      version: '23.2.2',
+      description: 'Bitcoin sidechain for confidential transactions, faster settlements, and issued assets. Run by the Elements Project.',
+      icon: '/assets/img/app-icons/liquid.png',
+      author: 'Blockstream',
+      dockerImage: 'ghcr.io/vulpemventures/elements:23.2.2',
+      manifestUrl: undefined,
+      repoUrl: 'https://github.com/ElementsProject/elements'
     }
   ]
 }