add Fumadocs guide

[fuma-nama]

Description

Add guide for migrating to Fumadocs from Mintlify.

Related Issues

N/A

Checklist

• [x] My code follows the code style of this project.
• [x] I have performed a self-review of my code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] I have updated the documentation, if necessary.
• [x] I have added tests that prove my fix is effective or my feature works.
• [x] New and existing tests pass locally with my changes.

Screenshots (if applicable)

Additional Notes

Need some further reviews on the guide, and validate if the mentioned info is enough for devs to migrate from Mintlify.

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Name	Status	Preview	Comments	Updated (UTC)
next-forge	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 8, 2024 4:25pm

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@fuma-nama is attempting to deploy a commit to the Hayden Bleasel Team on Vercel.

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[github-actions[bot]]

:rocket: PR was released in v2.18.32 :rocket: