Add format and format:check scripts (#1154)

* Add format and format:check scripts for consistency

Aligns with socket-btm and ultrathink convention:
- format: oxfmt --write . (auto-fix formatting)
- format:check: oxfmt . (check-only, CI)

* fix: use --check flag in format:check script

Author: jdalton

package.json

@@ -23,6 +23,8 @@
     "fix:all": "node scripts/fix.mjs --all",
     "lint": "node scripts/lint.mjs",
     "lint:all": "node scripts/lint.mjs --all",
+    "format": "oxfmt --write .",
+    "format:check": "oxfmt --check .",
     "// Claude": "",
     "claude": "pnpm --filter @socketsecurity/cli run claude --",
     "// Type Checking": "",