Run oxfmt across repo, add format script and ignore config

Format all non-generated files with oxfmt via `vp fmt`. Add
.oxfmtignore to skip bindings/ and wasm-pack output. Add npm
format script and update DEVELOPMENT.md docs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates-tauri/yaak-app/capabilities/default.json

@@ -1,9 +1,7 @@
 {
   "identifier": "default",
   "description": "Default capabilities for all build variants",
-  "windows": [
-    "*"
-  ],
+  "windows": ["*"],
   "permissions": [
     "core:app:allow-identifier",
     "core:event:allow-emit",