Update .gitignore to remove file exceptions (#1407)

Removed exceptions for specific test files in .gitignore.

## Summary
- Change: <concise one-liner>
- Scope: <files/modules>
- Fixes: #<issue>

## Evidence (Verification-First)
- Local tests: attach/paste `make test-ci` summary and timestamps
- Coverage: attach `coverage.txt` or `gcovr` summary (with versions)
- CI run URL(s): paste full Actions URLs for all required checks

## Risk / Compatibility
- Risk: <low/med/high>
- Backward-compat: <yes/no>
- Notes: <migration, deprecations, perf>

## Reviewer Checklist
- [ ] Commit title follows Conventional Commits
- [ ] PR links issue and includes evidence
- [ ] No skipped/disabled tests; scope is minimal and focused
- [ ] CI green and reproducible locally

Author: krystophny

.gitignore

@@ -23,7 +23,6 @@ test/output/*
 example/*/*.png
 example/*/*.pdf
 example/*/*.txt
-!example/python_bridge/commands_basic.txt
 .aider*
 terminal
 *.pyc
@@ -66,8 +65,6 @@ coverage.*
 *.exe
 *.out
 test/test_*
-!test/test_*.f90
-!test/test_*.py
 
 # Binary executables (comprehensive patterns)
 fortplot_bridge
@@ -143,5 +140,3 @@ test/output/**/*.ppm
 test/output/**/*.exe
 test/output/**/*.out
 
-# Force CI rebuild
-!