Script names differ in every frontend package

The same four jobs are spelled differently depending on which package you are in. `ui/` and `ui-ee/` use `test:unit`, `test:storybook`, `test:lint` and `check:types`. The design system and topology use `unit:test`, `storybook:test`, `lint:test` and `typecheck`, and `lint:fix` where the app packages say `lint`. Three more packages (slot-contracts, kestra-sdk, hey-api-plugin) only have `typecheck`.

So the command that worked in the directory you just left is wrong in the next one, and CI has to know both spellings. The design system also carried two identical type-check scripts, `typecheck` and `types:test`.

One convention, taken from the app packages since they are where most work happens. The design-system workflow in kestra-io/actions calls three of the old names, so it needs the matching change and the old names have to stay as aliases for one step, until that workflow is updated.

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