fix(commit): trim the text before matching with commit parser

[orhun]

Description

This PR changes the commit parser behavior to always trim the text (commit message, body, etc.) before matching it with a regex.

This means that you will be able to use $ in the regex for matching until the end.

Motivation and Context

closes #554

How Has This Been Tested?

Locally / tests / fixtures.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (no code change)
• Refactor (refactoring production code)
• Other

Checklist:

• My code follows the code style of this project.
• I have updated the documentation accordingly.
• I have formatted the code with rustfmt.
• I checked the lints with clippy.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.07%. Comparing base (9eb3d65) to head (9f943a1).

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #573   +/-   ##
=======================================
  Coverage   41.07%   41.07%           
=======================================
  Files          15       15           
  Lines        1069     1069           
=======================================
  Hits          439      439           
  Misses        630      630           

Flag	Coverage Δ
unit-tests	41.07% <100.00%> (ø)

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