Rewrite maifetch in Fortran

[alejandrorivas-pixel]

/claim #1

Summary

• replaces the Go module with a Fortran CLI in src/maifetch.f90
• preserves config file, environment variable, and CLI precedence for token, logo size, score count, and config path
• calls the MaiTea profiles and plays endpoints via curl, renders profile and recent-score output with ANSI styling, and keeps an optional left-side ASCII logo block
• adds fixture-driven validation plus a gfortran GitHub Actions workflow

Follow-up hardening

• added coverage for MAITEA_CONFIG_FILE so the documented config-file environment override is exercised by the fixture test
• documented the runtime curl dependency used for live MaiTea API requests

Validation

• gfortran --version -> GNU Fortran 15.2.0
• ./test/run-fixture.sh
• git diff --check
• fork workflow Fortran passed: https://github.com/alejandrorivas-pixel/maifetch/actions/runs/27565199619

payment details can be provided privately after maintainer acceptance.

[alejandrorivas-pixel]

Superseded by #22 after the maintainer requested an x86 assembly/NASM implementation for issue #1.