Add MRT_TableBodyEmptyRow component to render when table has no rows

[EdwardEB]

Replace component in MRT_TableBody with MRT_TableBodyEmptyRow component, that renders a MRT_TableBodyRow when table has no rows, and can be built on and improved in the future.

By doing this, the row that renders when the table is empty has the same props as an actual data row and would add consistency, flexibility, and the ability to use features like the detail panel.

Also added EmptyRow stories, to showcase the possible uses.

[vercel]

@EdwardEB is attempting to deploy a commit to the Kevin Vandy OSS Team on Vercel.

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[alessandrojcm]

LGTM @KevinVandy I know you were a bit hesitant over discord about this, however I think these are valid use cases. @EdwardEB on top of the couple of comments that I left there: 1) Could you please update the examples to use the useMantineReactTable hook? 2) Add the new component to the src/index.ts barrel file, thanks!

[EdwardEB]

@alessandrojcm I've made the changes you requested, but I could not find any comments on the files changed? Did you leave comments somewhere else that I may have missed?

[alessandrojcm]

@alessandrojcm I've made the changes you requested, but I could not find any comments on the files changed? Did you leave comments somewhere else that I may have missed?

Sorry I always forget to click start review check now please

[alessandrojcm]

Looks good now, thanks!