Bump app version to 0.2.1 and add Spell and DeleteButton components

- Introduced comprehensive `Spell` models with tagging and state management capabilities.
- Added reusable `DeleteButton` component with confirmation workflow for destructive actions.

package.json

@@ -1,7 +1,7 @@
 {
   "name": "eritorsscribe",
   "productName": "ERitors Scribe",
-  "version": "0.1.1",
+  "version": "0.2.1",
   "type": "module",
   "main": "dist/electron/main.js",
   "scripts": {