Fix filter matching pattern with and without test prefix

[ishuar]

📚 Description

• fixes Filter not working with test_ prefix #299

🔖 Changes

I added * in ${prefix}_*${filter} within function helper::get_functions_to_run to keep the match more dynamic even if it's not exactly after the prefix (test).

✅ To-do list

• I updated the CHANGELOG.md to reflect the new feature or fix
• I updated the documentation to reflect the changes

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Additional Notes For Reviewer

Ran Tests Locally to verify changes within the scope of state_test file.

1. Test with a matching string assertions inside the function name (9 functions have it) ✅

╰─$  ./bashunit tests/unit/state_test.sh -f assertions                                                         
bashunit - 0.14.0
Running tests/unit/state_test.sh
✓ Passed: Add and get assertions passed
✓ Passed: Add and get assertions failed
✓ Passed: Add and get assertions skipped
✓ Passed: Add and get assertions incomplete
✓ Passed: Add and get assertions snapshot
✓ Passed: Add twice and get assertions snapshot
✓ Passed: Initialize assertions count
✓ Passed: Export assertions count
✓ Passed: Calculate total assertions

Tests:      9 passed, 9 total
Assertions: 9 passed, 9 total

 All tests passed 
Time taken: 628 ms

2. Test with prefix test core issue reported with Filter not working with test_ prefix #299 ✅

╰─$ ./bashunit tests/unit/state_test.sh -f test_calculate
bashunit - 0.14.0
Running tests/unit/state_test.sh
✓ Passed: Calculate total assertions

Tests:      1 passed, 1 total
Assertions: 1 passed, 1 total

 All tests passed 
Time taken: 123 ms

3. Test without prefix and partial matching string in the function name ✅ (similar to [1])

╰─$ ./bashunit tests/unit/state_test.sh -f calculate_total                   
bashunit - 0.14.0
Running tests/unit/state_test.sh
✓ Passed: Calculate total assertions

Tests:      1 passed, 1 total
Assertions: 1 passed, 1 total

 All tests passed 
Time taken: 125 ms

[Chemaclass]

Many thanks! 👏🍻