Allow arbitrary logo text

[thearst3rd]

haha yes 👍

[Krzyhau]

Instead of hard-coding how every letter looks like, I was thinking that HAT could load an optional text file containing custom logo map, let's say logo.txt. If a file is present, its content would override the default array of characters. This way user would be able to customize the logo freely. This would be especially important if some letters would have to be altered to make a combination of them look visually pleasing, or, more importantly, if someone wanted to make amogus.

[thearst3rd]

haha amogus

once #3/a config system is fleshed out we could allow the user to configure what they want the logo to be in the config file 👀