Add Minecraft on Marp theme to list of community themes

[mikael-ros]

This is my own theme. I saw someone else adding their own, so I figured I would too.

Why awesome?

• It has a small amount of recognition already, with 2 stars
• It is a good example of what you can do with the sheer flexibility Marp provides

[yhatt]

Linter for Awesome lists is not passing. Check whether a description of the item is following awesome manifesto.
https://github.com/marp-team/awesome-marp/actions/runs/11564760521/job/32190794057#step:6:13

[mikael-ros]

I was missing a period, fixed now. Sorry for not checking the linter, I made these requests before bed. Next time I contribute in any Marp project (or elsewhere for that matter) I'll make a point of checking the rules and contributing guidelines. I do genuinely apologize for being a bit of a newbie when it comes to this.

[yhatt]

This pull request cannot be merged due to the following reasons:

• A merge conflict was introduced after merging Add Neobeam to list of community themes #4. Your explicit action is required to resolve this conflict.
• The theme and its README are containing direct references to commercial resources or descriptions that may encourage such references. Marp team must avoid any legal risks.