feat: implemented sudoku solver by recursion and backtracking

[Satvik-Singh192]

Description

Added a Sudoku Solver Visualizer using the backtracking algorithm under src/algorithms/Recursion/ and src/components/Recursion/.

This visualizer demonstrates the step-by-step solving process of a Sudoku puzzle using backtracking.
Each cell is color-coded during the solving process to clearly visualize recursion and backtracking in action.

• Green → Valid placement
• Red → Backtrack step
• Yellow → Current cell being processed

Semver Changes

• Patch (bug fix, no new features)
• Minor (new features, no breaking changes)
• Major (breaking changes)

Issues

Closes #29 — [Feature]: Sudoku Solver Visualizer

Checklist

• I have read the Contributing Guidelines.
• Added Sudoku Solver logic file in src/algorithms/Recursion/sudokuSolver.js.
• Added Sudoku Visualizer component in src/components/Recursion/sudokuSolver.jsx.
• Integrated SudokuSolver option in RecursionPage.jsx.
• Verified correct functioning and visual updates during solving.

[Satvik-Singh192]

@adityacosmos24 please review my PR sir