Mass sync async flag

[lukeholder]

Description

Allows an async flag to run the sync without a queue of the metafields saved after the product saves

php craft shopify/sync/all --async=0

also added to the utility:

Syncing of one product does synchronous syncing, but when mass syncing we put additional things like metafields into the queue.

[what-the-diff[bot]]

PR Summary

• Introduction of Asynchronous Property in SyncController: A new feature '$async' has been introduced to the 'SyncController'. This change brings the ability to simply control whether some tasks should be done in sequence or can be performed simultaneously.

• New Options Method added to SyncController: The SyncController has been further enhanced with the addition of a new method called 'options'. This method provides more flexibility and customization options while syncing.

• Improvements in SyncController & ProductController Actions: Considerable enhancements have been made to various methods like 'actionAll', 'actionProducts' in the SyncController and 'actionSync' in the ProductsController. These improvements offer more efficient syncing process.

• Updates to Product Query Preparing Process: The method 'beforePrepare' in ProductQuery has been revisited to enhance how product queries are prepared. This should lead to faster responses and better database performance.

• Enhancements in Product Syncing Methods: The methods 'syncAllProducts' and 'syncProductByShopifyId' within the class Products have seen modifications for better and efficient syncing of products.

• Modify Sync Template: The _sync.twig template has been updated to reflect all these changes and ensure a smooth user interface interaction, providing a better user experience.