chore: bump crate and extension versions to 0.5.0

Catches the workspace and the extension manifests up to the v0.5.x
release line (was still showing 0.2.0).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

extension/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "relicario-extension",
-  "version": "0.2.0",
+  "version": "0.5.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "relicario-extension",
-      "version": "0.2.0",
+      "version": "0.5.0",
       "dependencies": {
         "jsqr": "^1.4.0"
       },