Guides: Building Forms with Next.js

[MaedahBatool]

WIP: Waiting for my npm access.

Created a new Guides section in the left nav and added the guide about building forms with Next.js.

• Related issues using fixes Guide for creating forms with Next.js #29602
• Documentation added

Documentation / Examples

• Make sure the linting passes by running yarn lint

[molebox]

Looks good! I wonder it we should try change the content from being directly copied from the blog post though, as we already have the blog post, and SEO that goes to that. I think adding error handling to the guide would be really helpful for readers too. You could even add a section on using a form lib too, just to compare, such as formik and yup.

Also, the blog post is written like a blog post, where as in the docs we should aim to write in the second person, talking to the reader.

I think its a solid start! 🙌

[MaedahBatool]

All details in this PR: #32525