Chat UI improvements (#270) * move select a datasource * fix search * fix spacing in input * width * add inference model selection to the chat input * fix broken test * handle showing correct model before activeSession * handle tool calling enablement based on inference model * adjust width of options * fix up broken things, and provide models for projects to the chat initiator * adjust colors * capitalize * bug fix for retriever tool with no summaries * fix broken tests * split bedrock by model family --------- Co-authored-by: Elijah Williams <[email protected]> Co-authored-by: Baasit Sharief <[email protected]>