build: migrate workspace tooling to Oxc

Replace Turbo task orchestration with Bun workspace scripts and remove the Prettier configuration. Add Oxlint and Oxfmt project configuration, including Tailwind class sorting, generated-file exclusions, and unified check/fix commands. Apply the new formatter and resolve Hook dependency errors surfaced by Oxlint.

.oxfmtrc.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "./node_modules/oxfmt/configuration_schema.json",
+  "endOfLine": "lf",
+  "ignorePatterns": [
+    ".i18n/**",
+    "**/.output/**",
+    "**/coverage/**",
+    "**/dist/**",
+    "apps/web/src/locales/**/messages.ts",
+    "apps/web/src/route-tree.gen.ts"
+  ],
+  "printWidth": 80,
+  "semi": false,
+  "singleQuote": false,
+  "sortPackageJson": false,
+  "sortTailwindcss": {
+    "functions": ["cn", "cva"],
+    "stylesheet": "./packages/ui/src/styles/globals.css"
+  },
+  "tabWidth": 2,
+  "trailingComma": "es5"
+}