feat: harden generic preset, add LLM retry, and finish tooling/docs

- PatternDef.validate + Luhn-gated credit-card detection; de-overlap the
  generic phone/date/IP patterns; presets.swiss unchanged (production behavior)
- strip g/y flags from nameHint so .test() is stateless (latent footgun)
- openAICompatibleProvider: bounded retry on transient failures (network /
  timeout / 429 / 5xx), configurable via retries + retryDelayMs
- eslint + prettier + vitest coverage (97%); CI runs lint/format/coverage
- docs: README badges + new-option docs, SECURITY.md, issue/PR templates

26 tests passing; build emits ESM+CJS+types.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -46,12 +46,22 @@
     "build": "tsup",
     "test": "vitest run",
     "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage",
     "typecheck": "tsc --noEmit",
+    "lint": "eslint .",
+    "format": "prettier --write .",
+    "format:check": "prettier --check .",
     "prepublishOnly": "npm run build"
   },
   "devDependencies": {
+    "@eslint/js": "^9.0.0",
+    "@vitest/coverage-v8": "^1.6.0",
+    "eslint": "^9.0.0",
+    "eslint-config-prettier": "^9.1.0",
+    "prettier": "^3.2.0",
     "tsup": "^8.0.0",
     "typescript": "^5.4.0",
+    "typescript-eslint": "^8.0.0",
     "vitest": "^1.6.0"
   },
   "publishConfig": {