[DevTools] create error state for indicator (#74717)
# Add Issue Count Indicator to Next.js Dev Tools Logo
### What?
Adds a visual indicator showing the number of issues in the Next.js dev tools logo. The logo now displays a red circle with the issue count when there are active issues, and changes color to indicate error states.
### Why?
Improves developer experience by providing immediate visual feedback about the presence and number of issues without requiring interaction with the dev tools panel.
### How?
- Created a new `NextLogo` component with issue count display
- Added Storybook stories to showcase different states (no issues, single issue, multiple issues)
- Implemented dynamic styling based on issue count
- Added a red circular badge that appears when issues are present
- Updated the logo colors to reflect error states
