fix: improve images update performance on style switch (#8151)

* Refactor images related code, improve perfromance.

* Remove unwanted comments.

* Remove comment

* Make loadSprite async

* Fix docs nad bundle size

* Improve coverage

* Remove in test comments

* Add more tests to improve coverage

* Update src/style/style.test.ts

Co-authored-by: Frank Elsinga <frank@elsinga.de>

* Change according to code review

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Co-authored-by: Frank Elsinga <frank@elsinga.de>