[WIP] Initial implementation of Attribute and Variation components & bundles

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | yes
| Deprecations? | no
| Fixed tickets | #1273 
| License       | MIT
| Doc PR        | -

Read more about this change in #1273. This is the last thing before merging components.

* [x] Handle the translation changes.