Remove @sinclair/hammer dependency and task runner

- Remove @sinclair/hammer from devDependencies
- Remove hammer.mjs entry point
- Remove task/ directory (build scripts, benchmarks)
- Add build.mjs: standalone build script replicating the
  CJS/ESM compilation, package.json generation, notice
  stripping, and ESM specifier rewrite logic
- Update npm scripts to use build.mjs and direct tsc/mocha
  instead of hammer task commands

package.json

@@ -16,23 +16,15 @@
     "url": "https://git.alk.dev/alkdev/typebox"
   },
   "scripts": {
-    "test:typescript": "hammer task test_typescript",
-    "test:static": "hammer task test_static",
-    "test:runtime": "hammer task test_runtime",
-    "install:local": "hammer task install_local",
-    "benchmark": "hammer task benchmark",
-    "build:to": "hammer task build_to",
-    "build": "hammer task build",
-    "test": "hammer task test",
-    "clean": "hammer task clean",
-    "format": "hammer task format",
-    "start": "hammer task start",
-    "publish": "hammer task publish",
-    "publish:dev": "hammer task publish_dev"
+    "test:static": "tsc -p test/static/tsconfig.json --noEmit --strict",
+    "test:runtime": "tsc -p src/tsconfig.json --outDir target/test/runtime --target ES2020 --module Node16 --moduleResolution Node16 && mocha target/test/runtime/index.js",
+    "build": "node build.mjs build",
+    "clean": "node build.mjs clean",
+    "test": "npm run test:static && npm run test:runtime",
+    "format": "prettier --no-semi --single-quote --print-width 240 --trailing-comma all --write src test"
   },
   "devDependencies": {
     "@arethetypeswrong/cli": "^0.13.2",
-    "@sinclair/hammer": "^0.18.0",
     "@types/mocha": "^9.1.1",
     "@types/node": "^22.13.5",
     "ajv": "^8.12.0",