feat: auto-discover container images from registries

- Add ListImages() to registry interface, implement for Gitea
- Add owner field to registry config (needed for Gitea packages API)
- GET /api/registries/:id/images endpoint
- "Browse Images" button on Projects and Quick Deploy pages
- Image dropdown with registry grouping and search
- i18n support (EN/RU) for all new UI strings

web/src/lib/i18n/en.json

@@ -39,7 +39,12 @@
     "healthcheck": "Healthcheck Path",
     "nameRequired": "Name and image are required.",
     "loadFailed": "Failed to load projects",
-    "createFailed": "Failed to create project"
+    "createFailed": "Failed to create project",
+    "browseImages": "Browse Images",
+    "selectImage": "Select an image",
+    "noImages": "No images found",
+    "loadingImages": "Loading images...",
+    "imageLoadFailed": "Failed to load images"
   },
   "projectDetail": {
     "deleteProject": "Delete Project",
@@ -158,7 +163,12 @@
     "inspectedSuccess": "Image inspected successfully",
     "deployedSuccess": "Deployed {name} successfully!",
     "inspectFailed": "Failed to inspect image",
-    "deployFailed": "Deployment failed"
+    "deployFailed": "Deployment failed",
+    "browseImages": "Browse",
+    "selectImage": "Select an image from a registry",
+    "noImages": "No images found",
+    "loadingImages": "Loading...",
+    "imageLoadFailed": "Failed to load images"
   },
   "settings": {
     "title": "Settings",
@@ -214,6 +224,8 @@
     "token": "Token",
     "tokenHelpNew": "API token for authentication",
     "tokenHelpEdit": "Leave empty to keep the existing token",
+    "owner": "Owner",
+    "ownerHelp": "Package owner (e.g., username or organization) for image listing",
     "save": "Save",
     "saving": "Saving...",
     "update": "Update",