update with-tailwind example to use mdx

[JLarky]

Changes

• added mdx integration to with-tailwind example
• fixed component import from an old format to new MDX style
• ran formatting since it's different for .md and .mdx
• I can't run changeset for example folders
• I see that some examples use "workspace:*" as dependency version, I personally think this is an anti-pattern because it makes it harder to use examples with degit or something like that

before	after

Testing

I opened with-tailwind example at astro.new and saw that it wasn't working. You can test the new version in my fork

Docs

This just fixes a bug, no updates needed

[changeset-bot]

⚠️ No Changeset found

Latest commit: 9bd05f3

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[matthewp]

Wow, can't believe we had the old components in markdown implementation still in there. Thanks!