2025 Annual Letter + Automatically Update Media Banner

[kapil1garg]

✨ Features Updates

📌 Description

This pull request adds the 2025 Annual Letter. It also updates the homepage's media banner to automatically update the letter release year (e.g., "The 2025 DTR Annual Letter is out!"), so this no longer needs to be done manually.

🔍 Feature Changes

• Other: added 2025 annual letter.

🔄 Refactor Changes

• Improve maintainability: the year of release of the letter on the homepage no longer needs to be updated manually.

✅ Checklist

1. Feature Updates:

• Code follows project coding style.
• Tested in a Next.js environment.
• Relevant documentation is updated.

2. Code Refactor:

• [X ] No breaking changes introduced.
• Performance improvement validated.
• Documentation updated if necessary.

[github-actions]

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