refactor: adapt to WaterFlow framework - zero source changes required

- Remove duplicate platform layer and tool interface definitions
- Add BFS breadth-first search with depth annotation (sync from main)
- Use WaterFlow platform.fs for binary storage instead of custom storage
- Add installTrulyMEM() one-line registration function
- Update SKILL.md with 10 complete operations
- Add waterflow.d.ts type declarations
- Update bilingual README with simplified installation guide
- Build passes with 0 errors

ts/tsconfig.json

@@ -16,7 +16,8 @@
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "noImplicitReturns": true,
-    "noFallthroughCasesInSwitch": true
+    "noFallthroughCasesInSwitch": true,
+    "typeRoots": ["./src/types", "./node_modules/@types"]
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist"]