Adding Steam Deck built process

[vitormmatos]

It is indeed possible to build the game for Steam Deck.
I've done it, and works greatly.
I think it would be great to add it to the wiki.

I forked the project and added some instructions on how to, it can be checked on the link below:
https://github.com/vitormmatos/sm64plus/wiki/Manual-Building-Guide#steam-deck

[iamevn]

I have a couple questions about these instructions.

sudo sed -i 's/\(^\[.*\]\)/\1\nSigLevel = Never/g' /etc/pacman.conf

Why disable pacman's signature checks? If the keys need to be installed/updated, you should just need to install them with sudo pacman -Sy archlinux-keyring

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sudo pacman -Syyu --noconfirm
sudo pacman -S $(pacman -Ql | grep include | cut -d' ' -f1 | awk '!a[$0]++') --noconfirm

Lines 4 and 5 updates/upgrades packages and then queries installed packages that touch /usr/include/ and upgrade those again. Would the second line be unnecessary since everything was just upgraded?

[MorsGames]

I'll say that while I added my own Steam Deck building guide a while ago, since I don't have a Steam Deck myself, I cannot test it or really answer any questions about it. I'll keep this issue open in case anyone needs an alternate guide.