* feat(registry): eight more WebGPU shader backgrounds and a bundle with thirty new shaders
* refactor(registry): simpler bundle copy step in the shader build
* test(registry): every shader block ships the same bundle and names a shader in it
* refactor(registry): one block loader for the shader block tests
* test(registry): name the stale block and match only shader names
* chore(registry): shorter licence line at the top of the shader bundle
* test(registry): every shader block installs the bundle's licences