Bug: The genomic annotation in VCF format is not functioning correctly for certain variants, e.g., `1-55051215-G-GA`.

[berntpopp]

Steps to Reproduce

1. Run the following command:

   variant-linker --variant "1-55051215-G-GA"

2. Observe the error or incorrect output.

Expected Behavior

The tool should correctly annotate the variant provided in VCF format and return the expected annotations.

Actual Behavior

The tool fails to process the variant in VCF format, resulting in an error or incorrect output.

Proposed Solution

• Investigate the handling of VCF format inputs.
• Ensure the parsing logic correctly processes the input and generates the appropriate annotations.

Acceptance Criteria

• [x] The tool correctly processes variants in VCF format.
• [ ] Comprehensive tests are added to verify VCF format handling.
• [x] Documentation is updated to reflect any changes in VCF format handling.

[berntpopp]

This relates to #2

[berntpopp]

This also relates to #14 closed by commit e70a6ed08eae7d44ae5c0099d89c8314fb604620

[berntpopp]

The testing relates to #11 and #5 and will be handled there.