feat!: Added centerTitle + enableEnterToSubmit + some fixes to props names

[lcsvcn]

Description

Changes:

1. Change typo on props: backGroundColor and inComingChatBubbleConfig
2. Added centerTitle, so we can center both status and title.
3. Added enableEnterToSubmit, so if we press enter on keyboard it will send the message instead of adding new line
4. Some default values are now added to the props instantiation, to simplify code, such as elevation
5. Changed TypeIndicatorConfiguration to TypingIndicatorConfiguration, as Typing indicate better the status of the indicator.
6. inComingChatBubbleConfig to incomingChatBubble, since it receives a ChatBubble, not a ChatBubbleConfig and outcomingChatBubbleConfig to outcomingChatBubble, since it receives a ChatBubble, not a ChatBubbleConfig

Checklist

• The title of my PR starts with a [Conventional Commit] prefix (fix:, feat:, docs: etc).
• I have followed the [Contributor Guide] when preparing my PR.
• I have updated/added tests for ALL new/updated/fixed functionality.
• I have updated/added relevant documentation in docs and added dartdoc comments with ///.
• I have updated/added relevant examples in examples or docs.

Breaking Change?

• Yes, this PR is a breaking change.

• No, this PR is not a breaking change.

• backGroundColor is now: backgroundColor

• TypeIndicatorConfiguration is now: TypingIndicatorConfiguration

• inComingChatBubbleConfig is now: incomingChatBubble

• outgoingChatBubbleConfig is now: outgoingChatBubble

[aditya-css]

Hey @lcsvcn,
Thanks for contributing. Can you please isolate one change per PR and create separate PRs? This will enable thorough review and ease of revert just in case.