How to docs and fixes to be added to the mdbook documentation site

[anrichtait]

Description

• Copied most of the wiki docs over for the new mdbook site
• Fixed some formatting errors
• Changed relative paths to links to avoid errors (I have a script that does this automagically, I can send it on discord if anyone wants/needs it.

Images/Links

• Link to mdbook site: https://rh-hideout.github.io/pokeemerald-expansion/index.html

Issue(s) that this PR fixes

• Format issues with some of the files, i.e Headings not being consistent.
• Broken file paths have been changed to links so if these docs are moved in the future the relative paths will no longer be an issue.
• Lack of documentation on the new site
• Wrong files listed in How to add a new trainer, it was originally listed as trainer.c not trainers.h which sent the reader to a non existent file in the GHub

People who collaborated with me in this PR

Original Commits to wiki

1. ghoulslash - AI Logic, New battle script commands/macros
2. AsparagusEduardo - All the "How to add pokemon docs"
3. CancerFairy - How to add new move
4. LucaBGt and hedara90 - How to add a new trainer class
5. rylawesome and LOuroboros - Infinite Repel Item
6. hedara90 - Testing System

Feature(s) this PR does NOT handle:

Files still needing to be moved over:

• About the project
• Addenda
• Credits
• Expansions Improved Switch AI
• Totem Boosts
• Tutorials

Discord contact info

toonv#26526

[AsparagusEduardo]

Quick update to the description to properly credit CancerFairy for their move tutorial :)
(can't fully look at the PR right now)

[anrichtait]

New commit to the PR is just to make sure there are no conflicts after the last update to the master branch. I pulled the changes this morning (South Africa time)

[AsparagusEduardo]

I was about to merge this with the goal of polishing up the documentation in future PRs, but I'm not sure if we should include the Infinite Repel item article as part of it, as it is not a feature supported by the team. I believe it'd be better to remove it from this PR.

[anrichtait]

supported

No problem, I'll remove it. Let me know what I can change in the rest of the documentation, my morning is pretty open today.

[AsparagusEduardo]

Last thing that I would change for now.

Misclick

[AsparagusEduardo]

Meant to click "Request changes"