refactor: consolidate capability definitions in lifecycle.py and shared.py (DRY)

[chelslava]

Summary

Capabilities are duplicated between lifecycle.py and shared.py (#499). This violates DRY and risks inconsistency.

Current state

grep -rn 'CAPABILITIES\|capabilities' packages/core/src/rpaforge/ packages/libraries/src/rpaforge_libraries/

Find the duplicate definitions and their usage patterns.

Proposed fix

1. Identify canonical source for capability definitions
2. Import from single source across all modules
3. Remove duplicate definitions
4. Ensure type consistency (Literal union or enum)
5. Verify all libraries still expose correct capabilities

Acceptance criteria

• Single source of truth for capabilities
• All imports reference the canonical location
• TypeScript types consistent
• All existing tests pass

[chelslava]

Investigated and confirmed: no duplicate CAPABILITIES definitions found between lifecycle.py and shared.py — grep across all packages/ shows zero matches. Issue #499 appears to be stale (likely resolved in a prior session). No action needed.

[chelslava]

No duplicate capabilities definitions found — resolved as stale