Support custom VitePlugins in the Tina config

[coreyaus]

Notes

• This is intended to provide advanced ways to customise the Admin Portal build output.
• One example use case is to provide a custom tailwind plugin (similar to the TinaTailwind plugin) and build CSS for any custom React components we load in the Tina Admin portal via Tina field plugins.
  • Otherwise the Tailwind classes we use in Tina field plugins do not appear in the Tina Admin portal CSS.
• Hopefully this will help requests like the one here: 🔌 Plugins – How to use tailwind styles with plugins? #3912

[changeset-bot]

🦋 Changeset detected

Latest commit: a24db35

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

This PR includes changesets to release 21 packages

Name	Type
@tinacms/schema-tools	Minor
@tinacms/cli	Minor
tinacms-authjs	Patch
tinacms	Patch
@tinacms/graphql	Patch
@tinacms/mdx	Patch
@tinacms/search	Patch
starter-basic-iframe	Patch
starter-empty	Patch
e2e-next	Patch
@tinacms/self-hosted-starter	Patch
kitchen-sink-starter	Patch
@tinacms/starter	Patch
next-tinacms-cloudinary	Patch
next-tinacms-dos	Patch
next-tinacms-s3	Patch
tinacms-clerk	Patch
@tinacms/app	Patch
@tinacms/vercel-previews	Patch
@tinacms/datalayer	Patch
tinacms-gitprovider-github	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR