Add support for invoking input-shields. Remove 'chat' mode.

[manstis]

Description

I added support for invoking input-shields when defined.

I also remove the 'chat_completion_mode... what purpose did it serve; other than bypassing use of an agent`?

Type of change

• Refactor
• New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up dependent library
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Konflux configuration change

Related Tickets & Documents

• Related Issue #
• Closes #

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

• Please provide detailed steps to perform tests related to this code change.
• How were the fix/results from this change verified? Please provide relevant screenshots or results.

[tisnik]

it looks ok.

For the completion mode - it is much faster, at least on my machine, so I used it for demo purposes (did not want people to look at "reload" icon for ages during demo ;).

[tisnik]

@gallettilance PTAL

[tisnik]

approved