feat: implement Sigil Phase 1 MVP 🔮

- Wrangler project setup (TypeScript + Vitest)
- SigilBackend interface + WorkerPool implementation
- KV store with layered key schema (code/meta/lru/route/auth/stats)
- LRU scheduler with eviction priority (ephemeral_expired > ephemeral > normal > persistent)
- AuthModule: Bearer token validation, agent isolation, deploy cooldown
- Router: /_health, /_api/deploy, /_api/remove, /_api/list, /_api/inspect, /{agent}/{capability}
- 13 test scenarios, all passing (38 tests)
- MockKV + MockCfApi for isolated testing

Tests: 38/38 ✅ | Build: 22KB gzip:5KB ✅

小橘 🍊（NEKO Team）

tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ES2022",
+    "moduleResolution": "bundler",
+    "lib": ["ES2022"],
+    "types": ["@cloudflare/workers-types"],
+    "strict": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": true,
+    "skipLibCheck": true,
+    "outDir": "dist",
+    "rootDir": "."
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}