chore: Reorganize WebGPU folders in Core [DT-9593]

[Jarbuckle]

chore: Reorganize WebGPU folders in Core DT-9593

What

Realized it would be better to have the webgpu folder inside a parent rendering folder, and to have a global types file so that later, non-webgpu implementations of the rendering system could be implemented with lesser hassle. Basically, trying to encapsulate things a little more reasonably.

How

Moved stuff around! Made a types.ts file at the top-level!

PR Checklist

• Is your PR title following our conventional commit naming recommendations?
• Have you filled in the PR Description Template?
• Is your branch up to date with the latest in main?
• Do the CI checks pass successfully?
• Have you smoke tested the example applications?
• Did you check that the changes meet accessibility standards?
• Have you tested the application on these browsers?
  • Chrome (Fully supported)
  • Firefox (Major bug fixes supported)
  • Safari (Major bug fixes supported)