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>

plugins-external/faker/package.json

@@ -1,8 +1,8 @@
 {
   "name": "@yaak/faker",
-  "private": true,
-  "version": "1.1.1",
   "displayName": "Faker",
+  "version": "1.1.1",
+  "private": true,
   "description": "Template functions for generating fake data using FakerJS",
   "repository": {
     "type": "git",