[FEATURE]: Disable default block patterns

[jakewrfoster]

Description

Alleyvate should disable WordPress Core's default block patterns

Use Case

Core block patterns are often not optimized for the sites that we build and as such present more clutter and confusion for editors. To keep the UX clean and free of pitfalls for editors, the Core Block Patterns should be removed by default.

[jakewrfoster]

Issue originally raised by @kaitlinbolling