refactor system fonts to be generic exclusions list

[wordpressfan]

Description

Fixes #47
Refactor the system fonts exclusion method to be compatible with generic exclusions

Type of change

• New feature (non-breaking change which adds functionality).
• Enhancement (non-breaking change which improves an existing functionality).

Detailed scenario

What was tested

With Debug mode enabled on WPR, check that fonts excluded with the filter are not returned in the console.

How to test

Same as above.

Technical description

Documentation

Change the isSystemFont method to isExcluded and refactor the logic for precise match or substring match with either the font family or urls.

New dependencies

N/A

Risks

N/A

Mandatory Checklist

Code validation

• I validated all the Acceptance Criteria. If possible, provide screenshots or videos.
• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I implemented built-in tests to cover the new/changed code.

Code style

• I wrote a self-explanatory code about what it does.
• I protected entry points against unexpected inputs.
• I did not introduce unnecessary complexity.
• Output messages (errors, notices, logs) are explicit enough for users to understand the issue and are actionnable.

Unticked items justification

Not applicable to the changes in this PR

Additional Checks

• In the case of complex code, I wrote comments to explain it.
• When possible, I prepared ways to observe the implemented system (logs, data, etc.).
• I added error handling logic when using functions that could throw errors (HTTP/API request, filesystem, etc.)

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for bc8cd031	✅ 80.70% (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (bc8cd03)	Report Missing	Report Missing	Report Missing
Head commit (e078d65)	1409	1128	80.06%

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#48)	57	46	80.70%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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Footnotes

1. Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct. ↩