feat: migrate to TypeScript for WaterFlow framework

- Add TypeScript graph memory module (GraphDatabase, MemoryService)
- Add GraphMemoryTool for WaterFlow Tool interface
- Add bundled-skills for graph_memory, persona, task
- Remove Python code (core/, ui/, tests/, etc.)
- Remove redundant docs and build files
- Keep only ts/, docs/integration/, .gitignore, LICENSE

ts/tsconfig.json

@@ -0,0 +1,23 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true,
+    "exactOptionalPropertyTypes": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}