Padding/spacing updates for Messages

[thatblindgeye]

Following discussion with Wes from Ask RH, we want to make the following updates to padding/spacing:

• Universal/default: update the vertical padding between message groups from 48px to 24 px
• Compact: update the horizontal padding around the entire chatbot container to 16px
• Compact: update the vertical padding between message groups to 16px
• Compact: Update the horizontal padding on the Avatar/between the Avatar and the message metadata (entity name, time) to 8px

[github-actions]

🎉 This issue has been resolved in version 6.5.0-prerelease.11 🎉

The release is available on:

• GitHub release
• npm package (@prerelease dist-tag)

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