Create external VCs

[valeksiev]

Describe the background of your pull request

Fixes: https://github.com/alkem-io/client-web/issues/6867

Notes:

• The provider field is using autocomplete and is not matching the design 1 for 1; I couldn't get the regular dropdown to match the design
• I've removed the whole BoK section for external VCs as it doesn't make sense; this needs reviewing with @SimoneZaza and adjusting for the different scenarios.

Summary by CodeRabbit

Release Notes

• New Features

  • Introduced a new dialog for creating external AI contributors with form validation.
  • Enhanced functionality for managing virtual contributors with external configurations.

• Improvements

  • Improved rendering performance by ensuring unique keys for components in various lists.
  • Conditional rendering of content blocks in the VC Profile Page for better user experience.
  • Updated import statements to support new features and logic.

• Bug Fixes

  • Simplified the ExternalAIComingSoonDialog component for better usability.

• Chores

  • Refactored components and interfaces for better maintainability and clarity.