feat: implement Nostr Wallet Connect (NWC)

- Add applesauce-wallet-connect dependency
- Create WalletService for managing NWC connection
- Create WalletViewer component for UI
- Register 'wallet' command
- Fix build errors in spell/spellbook components due to applesauce-actions upgrade

package-lock.json

@@ -29,6 +29,7 @@
         "applesauce-loaders": "^4.2.0",
         "applesauce-react": "^4.0.0",
         "applesauce-relay": "latest",
+        "applesauce-wallet-connect": "^4.1.0",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
         "cmdk": "^1.1.1",
@@ -4851,6 +4852,23 @@
         "url": "lightning:nostrudel@geyser.fund"
       }
     },
+    "node_modules/applesauce-wallet-connect": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/applesauce-wallet-connect/-/applesauce-wallet-connect-4.1.0.tgz",
+      "integrity": "sha512-wr07zQP60wenO+KZ/xmWHtWBtXkmczj2zDgK73sDE0j34ZJWvJJ3RAVMv5KLWub55jUD4vuRVyrN2Nff5ux2lw==",
+      "license": "MIT",
+      "dependencies": {
+        "@noble/hashes": "^1.7.1",
+        "applesauce-core": "^4.1.0",
+        "applesauce-factory": "^4.0.0",
+        "nostr-tools": "~2.17",
+        "rxjs": "^7.8.1"
+      },
+      "funding": {
+        "type": "lightning",
+        "url": "lightning:nostrudel@geyser.fund"
+      }
+    },
     "node_modules/arg": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/arg/-/arg-5.0.2.tgz",