feat: addition of curve design variant with customization options

[Spiral-Memory]

Brief Title

Acceptance Criteria Fulfillment

• [x] Fixed emoji popup when sidebar opens
• [x] Cleaned up hardcoded colors and made UI more consistent with themes
• [x] Fixed Totp Modal
• [x] Fixed bounce while closing emoji popup
• [x] Added flexibility to customize options in ChatHeader, Message Toolbox, and Formatting Toolbar
• [x] Designed Bubble Variant
• [x] Refactor bubble styles
• [x] Fix the quote and pinned message UI.

Fixes #580

Video/Screenshots

https://github.com/RocketChat/EmbeddedChat/assets/78961432/ec02fdbc-285d-43a2-b0d4-bce5f9d0b2cd

https://github.com/RocketChat/EmbeddedChat/assets/78961432/06d61e66-8f17-423b-a339-1728323661b3

[Spiral-Memory]

Hey @sidmohanty11

This PR is now ready for review. I've fixed some bugs and made the menu customizable based on our discussion. Now, developers can pass the name of the option they want to keep in the theme object, and the other options will be automatically removed. If someone wants to wrap those options into a menu, they could pass a threshold, and the other options will be wrapped inside the menu.

Additionally, I've introduced the bubble variant in this PR. In each case, I've ensured that the display of attachments, thread reply button, quoting, or pinning the message matches the bubble variant.

The entire change is also explained in the attached video. Kindly review this PR. This was to add the variant for ChatBody. For Chat Input and Sidebar, I will also add variants in upcoming PRs, such as the Discord look, as per our discussion.

Thanks!

[Spiral-Memory]

Too good! This is awesome! Lets refactor this a bit in your next PR. LGTM!! 💯 🏆

Thank you so much, @sidmohanty11 , for the appreciation! Glad you liked it! I'll make the necessary changes in the next PR.