Select language models for agents

[tortmayr]

Issue: https://github.com/eclipsesource/osweek-2024/issues/42

Follow-up with known issues and improvements: https://github.com/eclipsesource/osweek-2024/issues/59

What it does

• Add section for re-configuring agent purposes ( i.e language model for a specific purpose)
• Introduce AISettingService service to retrieve and configure AI settings for a specific agent.
• Use Theia preferences as a storage sytem for the AI settings
• Add temporary languageModelRequirements to the DefaultChatAgent?
• Implement LanguageModelRegistry.selectLanguageModel method for the fronted language model registry

How to test

• Open the AI Settings view from the Open view... menu
• The view will display a list of all the available agents (currently only the Chat agent exists) and their properties
• Select one of the available purposes of the Agent
• Select one of the available language models
• The Language model selection should be persisted in the Theia preferences
• The Agent should use the selected model

demo.mp4

[jfaltermeier]

Besides the known issues from the follow up: when I just switch the purpose, the preference is not updated:

[sdirix]

I merged the PR into our code-completion PR. It works and I can select the language model for all our requests. Nice!

[jfaltermeier]

Besides that I did not find a further issue, so imo we may merge this and add above comment to the follow up.

[jfaltermeier]

This should probably try to update the preferences as well, but this can be done in a follow up.