Amazon Nova Models Support

[bigadsoleiman]

Issue #, if available:

Description of changes:
Adding support of new Amazon Nova models

• Amazon Nova Micro
• Amazon Nova Lite
• Amazon Nova Pro
• Amazon Nova Canvas
• Amazon Nova Reels

Backend

• Prevented the layer builder to remove boto3* botocore* since we need to install them from .whl this is until new boto3 apis are made public
• Added to langchain adapter a new regex to register bedrock.amazon.nova to use existing BedrockChatAdapter this will only work for Nova Micro since the other has to go through multimodal adapter.
• Changed SAFE_STR_REGEX to support multi-path s3 paths (i.e. private/user_id/videos/..../*.mp4) since the video generations forcefully puts videos under "randomid/output.mp4" under any S3 URI passed as output path.
• Changed MultiModalBase to support file upload/retrieval to/from S3, converse API and generation of non-text content (video/image)
• Adapted Claude/ Idefics adapters to new MultiModalBase class by returning the expected new structure.
• Created Nova adapter from MultiModalBase (using Converse API where currently possible)
  • Video generation relies on a new API bedrock.start_async_invoke which generates 6s video in background asynchronously in ~4m.

UI

• chat-message.tsx has been broken down in smaller components.
• added a chat-message-media-display.tsx to handle the display of media (image/video)
  • For video generation it assumes that if the S3 signed url is not avaible the video is still generating and does a long polling (every 30seconds) until the video is availble. This is a temporary solution to support async generation. A more robust backend workflow (stepfunctions?) should be implemented for long term.
• added video-dialog for video uploads (max 10MB)
• added seed options defaulting to 0 in llm-config-dialog, used only in image/video generation.
• added support for single selection of multiple OUTPUT modalities in the chat-input-panel.tsx based on model's OUTPUT_MODALITIES, default to first or only available one.

Ran vet-all for linting and testing.

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[charles-marion]

Thank you for the change!.