lab1(Hedi-Ayari): Add to roster

[Hedi-Ayari]

Week 1 Roster PR Checklist

General

• I have read the Contributing Guide
• I have read the Git Workflow Guide
• I understand the Code of Conduct

Roster

• I added my name and GitHub handle to labs/01_intro&databases/roster/handles.csv
• My entry follows the format: FirstName LastName,github_handle
• I created a branch named feat/roster-<handle> (e.g., feat/roster-Hedi-Ayari)
• I committed my changes with message: Add <handle> to roster

Submissions

• I created the directory labs/01_intro&databases/submissions/<github_handle>/
• I added notes.md with confirmation of running demo scripts and exercise results
• I added the completed ex01_multifasta_gc.py to my submissions directory

Environment

• I verified the environment works (smoke test passed)
• I ran all demo scripts successfully
• I completed the exercise and observed results (e.g., GC fraction calculations)

Pull Request

• My PR title follows the format: lab1(<handle>): short summary
• My PR description includes a brief summary of changes
• I targeted the correct base repository and branch (bozdogalex/bioinf-y4-lab:main)
• I have not pushed any data files to the repository (they are in data/work/ which is gitignored)