Documentation: Add the transforms page to the create block tutorial of the platform docs

[youknowriad]

Related #53874

What?

This is the forth page of the "create block type" tutorial on the "Gutenberg as framework" documentation website. It adds block transformations. I think we need to move the "reference" pages to the platform docs instead of the current handbook to be able to link to the "references" from both places, but that's for later.

For instance, I think we need a reference page for the transforms, the block supports...

You can check the current state of the website locally by doing:

cd platform-docs
npm install
npm start

[t-hamano]

I left some comments but it looks good to me.

One thing I noticed is that the custom block names in the "Create a block type" section are a mix of create-block/gutenpride and gutenpride/gutenpride-block. Perhaps we should unify to gutenpride/gutenpride-block?

[priethor]

Looks good to me too, so giving it a ✅

[youknowriad]

One thing I noticed is that the custom block names in the "Create a block type" section are a mix of create-block/gutenpride and gutenpride/gutenpride-block. Perhaps we should unify to gutenpride/gutenpride-block?

Good remark, I fixed it.

[t-hamano]

LGTM 👍

[github-actions]

Flaky tests detected in 4471c35.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/7018655521
📝 Reported issues:

• [Flaky Test] should move to the start of the first line on ArrowUp (-firefox) #56087 in /test/e2e/specs/editor/various/writing-flow.spec.js