Chore/migrate to using @bnb/skeleton alias

[niktek]

DO NOT MERGE:
Can't put it into draft mode for some reason.
In preparation for migrating to a monorepo.

• all doc site pages and components now use @brainandbones/skeleton as the alias as $lib/hardcoded/paths will not exist there post migration.
• added exports in index.ts for AppRail and AppRailTile - done in separate PR
• added exports in index.ts for DataTableService.ts and updated data-tables doc page - fixes DataTableService exports #478 (though they are not scoped name wise - not sure if we need to). May no longer be needed.

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Name	Status	Preview	Updated
skeleton-dev	✅ Ready (Inspect)	Visit Preview	Oct 31, 2022 at 7:45AM (UTC)

[niktek]

I seem to have lost the ability to put this PR back into draft mode :(

[endigo9740]

I've set it as a draft, but will be curious to hear more about what this entails.