feat(cli): add geo-matrix command to download and convert GEO matrix files to TSV

[aditi75432]

📋 Description

Added a new CLI command geo-matrix-to-tsv to pysradb for downloading and converting GEO Series Matrix files (GSE) to clean TSV format.
This supports optional skipping of downloads if files already exist.

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✅ Type of Change

• ✨ New feature (non-breaking change which adds functionality)

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ℹ️ Additional Information

🔧 Functionality:

• Command: pysradb geo-matrix-to-tsv GSE12345 --outdir ./output --skip-download
• Downloads the .txt/.gz matrix file from GEO FTP.
• Converts it into clean .tsv format for downstream analysis.
• Output is saved in the specified --outdir.

🧪 Testing:

• Manual testing performed using GSE10072, GSE60424
• Verified output TSV integrity, skips download correctly if --skip-download is set.

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📸 Screenshot/Logs

$ pysradb geo-matrix-to-tsv GSE10072 --outdir ./tsv_output

✔️ Download complete
✔️ Converted GSE10072_series_matrix.txt.gz → GSE10072_series_matrix.tsv

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🔗 Link to Ticket

Fix for - #229