feat(icons): add Lucide icon foundation

Add @lucide/angular dependency and a single shared entry point for
every icon in the app: app-icon (src/app/shared/ui/icon), backed by a
canonical name -> Lucide-icon registry (icon-registry.ts) covering
every concept the RC icon audit needs across storefront, builder, and
backoffice. One name per meaning, one default size/stroke-width, so
every screen renders the same icon the same way.

Package note: lucide-angular (unscoped) is deprecated upstream in
favor of @lucide/angular - installed the maintained package directly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package-lock.json

@@ -17,6 +17,7 @@
         "@angular/platform-browser": "21.1.5",
         "@angular/router": "21.1.5",
         "@angular/service-worker": "21.1.5",
+        "@lucide/angular": "^1.25.0",
         "primeicons": "^7.0.0",
         "primeng": "^21.0.3",
         "rxjs": "~7.8.0",
@@ -2009,6 +2010,19 @@
         "win32"
       ]
     },
+    "node_modules/@lucide/angular": {
+      "version": "1.25.0",
+      "resolved": "https://registry.npmjs.org/@lucide/angular/-/angular-1.25.0.tgz",
+      "integrity": "sha512-Hu1eHlGIeyamhSCFEO5YmiUlWn/h4y9BOXMDndY0HRu05CNeCt5BENkfBoeE/bzggMGGbYG+SOBkQUG939tFXw==",
+      "license": "ISC",
+      "dependencies": {
+        "tslib": "^2.3.0"
+      },
+      "peerDependencies": {
+        "@angular/common": ">=17.0.0",
+        "@angular/core": ">=17.0.0"
+      }
+    },
     "node_modules/@modelcontextprotocol/sdk": {
       "version": "1.26.0",
       "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.26.0.tgz",