fix: standardize format/format:check scripts (oxfmt --write/--check)

Author: jdalton

package.json

@@ -21,6 +21,8 @@
     "check:all": "node scripts/check.mjs --all",
     "fix": "node scripts/fix.mjs",
     "fix:all": "node scripts/fix.mjs --all",
+    "format": "oxfmt --write .",
+    "format:check": "oxfmt --check .",
     "lint": "node scripts/lint.mjs",
     "lint:all": "node scripts/lint.mjs --all",
     "// Claude": "",