Collection view: table columns definition

[jossmac]

Implements the columns definition proposal, while maintaining the original API.

Thank you jplhomer for your work in #1110, we appreciate your patience on this feature.

Resolves #1250

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: eb3fed1f946625591a2178f5fce69fe93808e93f

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 13 packages

Name	Type
@keystatic/core	Patch
keystatic-docs	Patch
@keystar/docs	Patch
@example/astro-content	Patch
@example/astro	Patch
@example/localization	Patch
@example/next-app	Patch
@example/next-block-builder	Patch
@example/next-pages	Patch
@keystatic/remix-test-app	Patch
@keystatic/templates-astro	Patch
@keystatic/templates-nextjs	Patch
@keystatic/templates-remix	Patch

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