refact: Refactor snapshot tests to conditionally skip based on options

[deleonio]

This pull request refines the visual testing logic in theme-snapshots.spec.js by introducing more granular control over snapshot options and skipping unnecessary tests. The changes improve test efficiency and maintainability by organizing snapshot-related configurations under a snapshot object.

Improvements to snapshot test logic:

• Added conditional logic to skip unnecessary tests: Introduced checks to skip both normal and zoom snapshot tests if the skip flag is set in the snapshot configuration. This avoids running redundant tests. [1] [2]

• Refined viewport and timeout handling: Updated the code to pull viewportSize and waitForTimeout values from the snapshot configuration, ensuring these settings are scoped specifically to snapshot-related options.

• Improved snapshot option merging: Replaced the direct use of DEFAULT_SNAPSHOT_OPTIONS with a new SNAPSHOT_OPTIONS object that merges default options with specific snapshot-scoped configurations. This makes the code more modular and easier to extend.

• Enhanced zoom test options: Added support for merging additional zoom-specific options into the snapshot configuration, enabling more flexibility for zoom tests.

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• Meaningful pull request title for the release notes
• Pull request is linked to an issue and all changes relate to the issue
• Tests to protect this code implemented (if applicable)
• Manual test performed successfully (if applicable)
• Documentation or migration has been updated (if applicable)

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