Closes #34: exclude svg use from lrc

[Miraeld]

Description

Fixes #34

We are adding a _getSvgUseTargets function to BeaconLrc so we can detect svg use and avoid processing them.

Type of change

• Bug fix (non-breaking change which fixes an issue).

Detailed scenario

Refer to wp-media/wp-rocket#6978

Technical description

Documentation

Purpose: The method gathers all parent elements of elements in the document. This is useful for operations that need to affect or be aware of the entire SVG hierarchy.
Implementation:
It first selects all elements in the document.
For each element, it traverses up the DOM tree, collecting each parent element until it reaches the .
It uses a Set to ensure that each parent element is collected only once.
Finally, it returns an array of these parent elements.

New dependencies

None

Risks

None

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.

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +1.46% (target: -1.00%)	✅ 100.00% (target: 50.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (261e1f8)	635	400	62.99%
Head commit (17905b5)	661 (+26)	426 (+26)	64.45% (+1.46%)

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 (#37)	27	27	100.00%

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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[jeawhanlee]

Test coverage here is below 50%, it would make sense if we could have higher test coverage here.