feat: Add button to cancel LLM response (#1978)

* feat: Add button to cancel LLM response
- Replace text area with cancel button when loading.
- Add useEffect to change elipsis in cancel button text.
- Add new SVG icon for cancel response.
- Button colors match Figma designs.

* fix: Cancel button UI matches new design
- Delete cancel-response svg.
- Change previous cancel button to match the new Figma design.
- Remove console log in handleCancel function.

* fix: Adjust cancel button rounding

* feat: Update UI for send button
- Add SendArrowIcon component, enables dynamic svg color changes
- Replace original icon
- Update colors and hover effects

* (fix:send-button) minor blink in transition

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Co-authored-by: Manish Madan <manishmadan321@gmail.com>

frontend/src/components/MessageInput.tsx

@@ -11,6 +11,7 @@ import ClipIcon from '../assets/clip.svg';
 import DragFileUpload from '../assets/DragFileUpload.svg';
 import ExitIcon from '../assets/exit.svg';
 import SendArrowIcon from './SendArrowIcon';
+import SendArrowIcon from './SendArrowIcon';
 import SourceIcon from '../assets/source.svg';
 import DocumentationDark from '../assets/documentation-dark.svg';
 import ToolIcon from '../assets/tool.svg';