refactor: remove debug console logs and improve TypeScript type safety

[ShubhamPatra]

This PR improves code quality by removing unnecessary debug logging and enhancing TypeScript type safety in the codebase.

Changes

• Remove build-time console.log statements from compileMDX.ts that were logging cache hits/misses
• Improve TypeScript types in usePendingRoute.ts by replacing any with NodeJS.Timeout | undefined
• Add conditional guards before clearTimeout calls to prevent passing undefined values
• Bump DISK_CACHE_BREAKER from 11 to 12 after modifying compileMDX.ts

This results in :

1. Cleaner Build Output: The console logs in compileMDX.ts were debug statements that cluttered the build process without providing value to end users
2. Better Type Safety: Replacing any with explicit types improves code maintainability and catches potential errors at compile time, aligning with the project's strict TypeScript configuration
3. Cross-Environment Compatibility: Added proper type guards to handle NodeJS.Timeout type correctly in both server and client environments

Files Changed

• src/utils/compileMDX.ts - Removed 2 console.log statements, bumped cache breaker
• src/hooks/usePendingRoute.ts - Improved timer type definition and added null checks

[github-actions]

Size changes

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