fix blocks develop

[gentiprenaj]

Fix WooCommerce Blocks compatibility for payment methods

Problem

In the Site Editor, Buckaroo payment methods showed "Incompatible with block-based checkout," and on some stores the Cart/Checkout blocks failed to hydrate (stuck on loading) after upgrading.

Root cause

• The plugin never declared cart_checkout_blocks compatibility, and registered a single umbrella Blocks integration instead of one per gateway — so WooCommerce flagged every gateway as incompatible.
• The shared buckaroo-blocks script hard-depended on the conditionally-loaded Apple Pay / Google Pay scripts. When those weren't registered (Apple Pay off, or on the Cart page), WordPress dropped the whole Cart/Checkout block script chain, so Store API hydration never completed.

Changes

• Declare cart_checkout_blocks compatibility (before_woocommerce_init).
• Register a Blocks payment method type per enabled gateway (BuckarooBlocks) so each is recognised as compatible.
• Centralise/clean the buckaroo-blocks script registration (BuckarooBlocksScript) and drop the fragile Apple/Google Pay dependencies (components already guard those globals).
• Gate availability in canMakePayment: methods show as compatible in the editor but are only offered at checkout for a supported store currency.
• Content-hash the bundle version so a new build always busts the cache.

Testing

• Site Editor: no incompatibility warnings, no "switch to Classic Checkout" notice.
• Cart & Checkout blocks hydrate; Store API completes.
• Currency-restricted methods (Swish/Twint/Blik) hidden at a EUR checkout; express buttons still work.
• Classic checkout unchanged.