docs: create an intro section about Nerd Fonts

[CBID2]

Author checklist (Completed by original Author)

• Good fit for the Rocky Linux project? Title and Author Metatags inserted ?
• If applicable, steps and instructions have been tested to work
• Initial self-review to fix basic typos and grammar completed

Rocky Documentation checklist (Completed by Rocky team)

• 1st Pass (Document is good fit for project and author checklist completed)
• 2nd Pass (Technical Review - check for technical correctness)
• 3rd Pass (Detailed Editorial Review and Peer Review)
• Final approval (Final Review)

Issue

Relates to #2161

Note

This PR fulfills the fifth bullet point of my RSOD proposal.

[github-actions]

Test results for 963d372:

Number of broken URLs: 1

URL,RESULT,FILENAME
 https://azuremarketplace.microsoft.com/en-us/marketplace/apps/resf.rockylinux-aarch64,failed,guides/cloud/migration-to-new-azure-images.md

[CBID2]

Made the changes @SergeCroise

[sspencerwire]

@CBID2 Thanks for your interest in modifying this document. Unfortunately, (and perhaps this is a problem with your RSOD list in general) In order to qualify for the RSOD, it must be a new document, rather than an edit to an existing document, and fit within the "Desktop" category found here. Modifying existing documents, while helpful, does not fulfill the goals of the RSOD. @wsoyinka Please chime in here as well.

[sspencerwire]

@all-contributors add @CBID2 for content

[allcontributors]

@sspencerwire

I've put up a pull request to add @CBID2! 🎉