feat: Implement session management features including modal handling,…

[Felipe-258]

… select menus, and session archiving

• Added modal submission handling for creating new sessions with validation.
• Implemented string select menu interactions for model and project selection.
• Enhanced session channel creation with agent mode and project alias management.
• Introduced session archiving and reopening functionality.
• Updated data store to manage archived sessions and channel agents.
• Created a new hub command to configure project and model settings with interactive buttons.
• Added session flow services for managing session channels and sticky messages.
• Improved error handling and logging throughout the session management process.

Summary

Related Issue

Closes #

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring (no functional changes)

Changes Made

Testing

• I have tested this locally
• I have added/updated tests (if applicable)
• All existing tests pass (npm test)

Checklist

• My code follows the existing code style
• I have not included version bumps (maintainer handles versioning)
• I have updated documentation if needed
• This PR focuses on a single feature/fix

Screenshots (if applicable)

Additional Notes