feat: rgba swizzles for vectors

[iwoplaza]

Right now, vectors only have .xyzw swizzles. The aim of this task is to add .rgba swizzles, doubling the amount of total properties on vectors.

Note that we don't want to support mixing component variants, so for example a .xrgy swizzle is invalid.

Code generation should also be updated to support this functionality, mainly "accessProp.ts".

Create proper tests for access of these new swizzles, both in regular JS code, as well as in "use gpu" functions.