Add Azure DevOps Business Central time tracker

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Summary

Implements the Azure DevOps Business Central Time Tracker MVP for issue #1.

What is included

• Azure DevOps work item form extension manifest (vss-extension.json)
• Work item embedded time entry UI
• Manual time entry fields: date, hours, description, optional BC job number
• Work-item scoped time history and total hours
• Date-range filtering
• Business Central API adapter for timeRegistrationEntries
• OAuth access-token flow stub without embedding client secrets
• Local fallback/reference storage for MVP testing
• Privacy/terms documents and placeholder marketplace images
• Lightweight validation test

Validation

npm test

Result: Validation passed

Security notes

• No client secret is embedded in browser code.
• AUTH_CONFIG.clientId and BC tenant/company/employee settings must be configured before real sync.
• For production marketplace use, OAuth should be hardened with PKCE/server-side token handling and secure org settings.

Bounty payout

If accepted/merged, payout can be sent via Bitcoin Lightning/BTC route to the provided recipient address or requested Lightning address flow.

BTC fallback address: 1BL4eV82zZ64Dp4cj3s9EgJ3ae8xPx5ZuJ