WP Optimize Premium 4.1.1

* FEATURE: Premium - Auto-detect images lacking dimension attributes and add them to improve CLS
* FIX: Fixed the issue that disabled WebP conversion due to checking all shell commands for WebP compression
* FIX: Premium - Unused Images - The unused image size deletion functionality does not work when images are not in the /yyyy/mm/ folder
* REFACTOR: Removed unnecessary static methods in WebP class
* TWEAK: Image compression - Rolled back to using popup error notices as in versions prior to 3.4.0
* TWEAK: Added a more descriptive error with resolution proposals for failed gzip compression and browser cache tests
* TWEAK: Fix broken unused image list thumbnails and download as csv link in Multisite
* TWEAK: Fix the singleton pattern in Heartbeat class
* TWEAK: Image compression functionality added to the Media Library page
* TWEAK: Premium - Cache - Added support for Aelia Currency Switcher plugin
* TWEAK: Premium - Unusued images - improve clarity in UI for images in post revisions
* TWEAK: Added additional checks to the `implode()` function to mitigate the risk of fatal errors on certain instances

* FEATURE: Premium - Host Google and minimal analytics scripts locally
* FIX: Premium - Cache - Single page cache purge/preload feature isn't working
* TWEAK: Add logging for the WebP feature
* TWEAK: Allow minification of script modules
* TWEAK: Cache - Purge the cache when the site is migrated
* TWEAK: Improvements to asset minification cache logic
* TWEAK: Improvements to reSmushIt curl error message
* TWEAK: Minify - Added an option to disable Google Fonts processing when it causes conflicts with other plugins
* TWEAK: Move all WPO files from the `uploads` folder to `uploads/wpo`
* TWEAK: Style improvement of the loading modals

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