Enterprise slug support in Copilot scopes

[ewega]

Summary

Fix scope ID computation to match the incubator-devlake plugin's convention when enterprise is configured.

Changes

• Add \Enterprise\ field to \CopilotScope\ struct in \internal/devlake/types.go\
• Implement \copilotScopeID(org, enterprise)\ helper with correct logic:
  • Enterprise + Org -> \�nterprise/org\
  • Enterprise only -> \�nterprise\
  • Org only -> \org\
• Update \putCopilotScope\ and \scopeCopilot\ to accept and pass enterprise parameter
• Thread enterprise through all configure commands (scopes, projects, full)
• Add --enterprise\ flag to \configure scopes\ and \configure projects\ commands
• Add
  esolveEnterprise()\ helper (flag -> state file -> skip)
• Add \Organization/\Enterprise\ fields to \Connection\ struct for API responses

Acceptance Criteria

• \copilotScopeID\ unit tests pass for all edge cases (7 cases)
• Org-only scope: ID = \my-org\
• Enterprise+Org scope: ID = \my-enterprise/my-org\
• Enterprise-only scope: ID = \my-enterprise\
• State file persists enterprise and auto-resolves on subsequent commands
• Blueprint references correct scope ID

[ewega]

Implemented in the enterprise support branch. Scope ID fix, connection testing, rate limit alignment, and Connection struct enrichment all shipped.