test: add comprehensive testing infrastructure with critical bug fixes

- Add Vitest testing framework with 88 passing tests across 4 test files
- Fix critical entity validator bug (service array index)
- Implement validator architecture with 'matched but invalid' state support
- Add strict IPv4/IPv6 validation with detailed error messages
- Add case-insensitive domain and ASN matching
- Add explicit validator priority ordering (url→json→tld→ip→domain)
- Add integration tests with real IANA registry validation
- Add AutnumCard component for AS number display
- Update dependencies: prettier 2.8.1→2.8.8

Test coverage:
- helpers.test.ts: IPv4/IPv6 CIDR matching (27 tests)
- helpers.asn.test.ts: ASN range validation (22 tests)
- rdap.test.ts: Type detection with edge cases (36 tests)
- rdap.integration.test.ts: Real IANA registry tests (3 tests)

Bug fixes:
- Entity validator now correctly uses service[1] for tags (0=email, 1=tags, 2=urls)
- IPv4 validation rejects octets >255 with specific error messages
- IPv6 validation checks for invalid hex chars and multiple ::
- Domain regex supports multi-label domains (a.b.c.d.example.net)
- Type detection priority prevents URL/JSON false matches as domains

package.json

@@ -9,7 +9,9 @@
     "start": "next start",
     "test": "vitest",
     "test:ui": "vitest --ui",
-    "test:run": "vitest run",
+    "test:run": "vitest run --exclude '**/*.integration.test.ts'",
+    "test:integration": "vitest run --include '**/*.integration.test.ts'",
+    "test:all": "vitest run",
     "type-check": "tsc --noEmit"
   },
   "dependencies": {
@@ -45,7 +47,7 @@
     "eslint-config-next": "13.1.1",
     "happy-dom": "^20.0.8",
     "postcss": "^8.4.14",
-    "prettier": "^2.8.1",
+    "prettier": "^2.8.8",
     "prettier-plugin-tailwindcss": "^0.2.1",
     "tailwindcss": "^3.2.0",
     "type-fest": "^4.18.2",