perf: allow to clear internal caches

[marcmrf]

Description

Holding caches indefinitely can be problematic for single-page applications, especially when dealing with large images (e.g., 20 MB). Providing a method to release resources when views are unmounted helps prevent excessive memory usage.

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)
• Enhancement (changes that improvement of current feature or performance)
• Refactoring (changes that neither fixes a bug nor adds a feature)
• Test Case (changes that add missing tests or correct existing tests)
• Code style optimization (changes that do not affect the meaning of the code)
• Docs (changes that only update documentation)
• Chore (changes that don't modify src or test files)

Self Check before Merge

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.50%. Comparing base (d9b2fcf) to head (e3f5931).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/embed-webfonts.ts	25.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #560   +/-   ##
=======================================
  Coverage   66.50%   66.50%           
=======================================
  Files          10       10           
  Lines         612      612           
  Branches      150      150           
=======================================
  Hits          407      407           
  Misses        144      144           
  Partials       61       61           

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