feat(client):improve chat ux

[yuval-hazaz]

Close: #8390

PR Details

• Allow the user to use enter to submit the message while using shift + enter for a new line
• expand the height of the text input when writing a multi-line message
• Enable the text input even when the button is disabled (chat is processing) - to allow the use to start writing the next message without waiting for the end of the response (do not allow submit)

PR Checklist

• Tests for the changes have been added
• npm test doesn't throw any error

IMPORTANT: Please review the CONTRIBUTING.md file for detailed contributing guidelines.

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[yuval-hazaz]

@mulygottlieb @overbit I added to this PR a new package to work with hotkeys
The package we currently use is not being maintained for several years already and the new package brings more capabilities that we needed.

I didn't do it as part of this PR, but we should sometime replace the old package with the new packages and remove the old one

https://npmtrends.com/react-hotkeys-vs-react-hotkeys-hook