**Add Sudoku Solver & Generator + Fix React Hook Warnings + ESLint Setup**

[navin-oss]

Description

The Development Tools section currently lacks an interactive puzzle/logic tool and has minor React hook dependency warnings that reduce code quality and may cause unstable re-renders.

Additionally, the missing ESLint configuration makes it harder to maintain consistent code standards across the project.

---

Solution

This PR introduces:

✅ New Feature

Sudoku Solver & Generator Tool

• Generate Sudoku puzzles (Easy / Medium / Hard)
• Auto-solve puzzles instantly
• Interactive editable grid
• Responsive UI for desktop + mobile
• Clean and modular component structure

✅ Fixes

• Resolved react-hooks/exhaustive-deps warnings in:

  • apiKeyGenerator.tsx
  • fibonacciCalculator.tsx

• Wrapped functions using useCallback

• Corrected useEffect dependencies to prevent unnecessary re-renders

✅ Improvements

• Added .eslintrc.json for linting consistency

• Improved maintainability and overall code quality

• Registered the Sudoku tool inside:

  • constants.tsx
  • developmentToolsConstant.tsx

---

Alternatives

• Keep existing tools only (no puzzle feature)
• Ignore hook warnings (not recommended due to potential bugs)
• Use an external Sudoku library (avoided to keep the bundle small and fully custom)

The chosen approach keeps the implementation lightweight and fully maintainable within the project.

---

Additional context

• Lint passes with zero warnings
• All tools verified working
• Sudoku tested for generation and solving correctness
• UI tested on both mobile and desktop
• Screenshots attached in the PR

[navin-oss]

I solved this already please check and tell me if any problem