feat: Phase 1 — core primitives (hash + CBOR + memory store)

- CBOR deterministic encoding (cborg, RFC 8949 §4.2)
- XXH64 → 13-char Crockford Base32 hashing
- createMemoryStore() with idempotent put
- verify() integrity check
- bootstrap() self-referencing meta-schema seed
- 23 tests passing, biome clean

Closes #3
小橘 <xiaoju@shazhou.work>

tsconfig.json

@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "exactOptionalPropertyTypes": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+    "verbatimModuleSyntax": true,
+    "skipLibCheck": true,
+    "composite": true,
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "outDir": "dist"
+  },
+  "exclude": ["node_modules", "dist"]
+}