docs: add use at your own risk disclaimer

[MattyMailers]

Summary

Adds explicit "use at your own risk" and no-liability language for SmartMoving MCP.

What changed

• Adds data-loss/problem/error/no-liability disclaimer to top-level NOTICE.md.
• Adds the same disclaimer to mcp-server/NOTICE.md so it ships with the npm package.
• Adds a prominent risk note in the main README safety section.
• Adds a package README note before verification/tool docs.

Disclaimer coverage

The language covers:

• data loss
• data corruption
• incorrect results
• failed API requests/syncs
• downtime
• duplicate or missing records
• CRM configuration problems
• account issues
• business interruption
• lost revenue
• other problems, errors, damages, or losses

Verification

• npm run verify
• npm pack --dry-run confirms package includes NOTICE.md