feat: adds create_view operation to update_project

[mnkiefer]

• Adds support for creating GitHub Project views (table, board, roadmap) via the update_project action.
• Also includes:
  • New operation parameter to select between updating items and creating views
  • Updates the input schema and documentation
  • New tests

[mnkiefer]

@copilot Check implementation and add tests.

[Copilot]

@mnkiefer I've opened a new pull request, #9798, to work on those changes. Once the pull request is ready, I'll request review from you.

[mnkiefer]

@copilot lint and lint go.

[Copilot]

@mnkiefer I've opened a new pull request, #9800, to work on those changes. Once the pull request is ready, I'll request review from you.