Add Bulk File Renamer automation project

[Singh0622]

Description

Add Bulk File Renamer mini-project - A simple CLI tool to bulk rename files using custom patterns (e.g., IMG_001.jpg → vacation_1.jpg).

Fixes #N/A

• Issue_no: ```
• Not applicable

Type of change

• New project insert
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation Update

Project

• Your Project Name: Bulk File Renamer

• Short Description: CLI automation tool that renames multiple files in a folder using a pattern. Interactive preview, handles conflicts, cross-platform, standard library only.

Checklist:

Please tick all the boxes that are fulfilled by your Pull Request.

• I have named my files and folder, according to this project's guidelines.
• My code follows the style guidelines of this project.
• I have commented on my code, particularly in hard-to-understand areas.
• I have created a helpful and easy to understand README.md, according to the given README_TEMPLATE.md
• My changes do not produce any warnings.