feat(wisekeep): rename transcriber app to wisekeep

Rebranding the transcriber application to better reflect its purpose:
AI-powered wisdom extraction from video content.

Changes:
- Renamed folder: apps/transcriber → apps/wisekeep
- Updated all package names to @wisekeep/* namespace:
  - @wisekeep/backend
  - @wisekeep/web
  - @wisekeep/landing
  - @wisekeep/mobile
  - @wisekeep/shared-types
- Updated root package.json scripts:
  - wisekeep:dev, dev:wisekeep:backend, dev:wisekeep:web, etc.
- Updated documentation in CLAUDE.md files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

apps/transcriber/package.json

@@ -1,22 +0,0 @@
-{
-  "name": "transcriber",
-  "version": "1.0.0",
-  "private": true,
-  "description": "YouTube Transcriber - AI-powered video transcription",
-  "scripts": {
-    "dev": "turbo run dev",
-    "dev:backend": "pnpm --filter @transcriber/backend dev",
-    "dev:web": "pnpm --filter @transcriber/web dev",
-    "dev:landing": "pnpm --filter @transcriber/landing dev",
-    "dev:mobile": "pnpm --filter @transcriber/mobile dev",
-    "build": "turbo run build",
-    "lint": "turbo run lint",
-    "type-check": "turbo run type-check",
-    "clean": "turbo run clean"
-  },
-  "devDependencies": {
-    "turbo": "^1.13.4",
-    "typescript": "^5.9.3"
-  },
-  "packageManager": "pnpm@9.15.0"
-}