Implement MCP HTTP transport (v0.1.0)

[Bleyle823]

Summary

• Implement the shared KeeperHub MCP HTTP kernel in both TypeScript (@keeperhub/mcp-client) and Python (keeperhub-mcp-client).
• TypeScript: KeeperHubMcpClient with lazy session bootstrap, ools/call, automatic re-init on 401/404, API key resolution (KH_API_KEY / KEEPERHUB_API_KEY), and kh_ vs wfb_ key classification
• Python: equivalent client using httpx (replaces scaffold mcp SDK dependency), plus matching key helpers
• Add unit tests: 12 Vitest tests (TS) and 4 pytest tests (Python)
• Bump both packages to 0.1.0 and update root/package READMEs for first publish
• Remove unused @modelcontextprotocol/sdk dependency from TS package; use direct HTTP transport instead
• Add prepublishOnly build hook for npm publish from packages/mcp-client

Test plan

• pnpm --filter @keeperhub/mcp-client build succeeds
• pnpm --filter @keeperhub/mcp-client test - 12 tests pass
• python -m pytest python/tests/ - 4 tests pass
• Maintainer bootstrap publish to npm (@keeperhub/mcp-client@0.1.0) - first publish must be manual before Trusted Publisher works
• Tag
  pm-v0.1.0 to trigger release workflow after npm bootstrap
• Tag py-v0.1.0 to trigger PyPI trusted publishing

Notes

• Publish npm from packages/mcp-client/ only (not repo root)
• Framework plugins (Eliza, OpenClaw, Hermes) remain in their respective ecosystems and will depend on these packages once published

[Bleyle823]

For maintainers - post-merge release checklist

This PR implements v0.1.0 of both clients and is ready for review/merge. After merge:

npm (@keeperhub/mcp-client)

1. Bootstrap publish manually once (Trusted Publisher requires an existing package):
   �ash cd packages/mcp-client npm run build npm publish
2. On npmjs.com ? @keeperhub/mcp-client ? Settings ? Trusted Publisher ? GitHub Actions (KeeperHub/mcp-client, workflow
   elease-npm.yml)

CI

• Added .github/workflows/ci.yml - runs TS build/test/type-check + Python pytest (3.9 & 3.12) on PRs and main

Verified locally

• 12 Vitest tests pass
• 4 pytest tests pass