Add a page about setting Fonts

[pw-rey]

User Story

As a Pokémon Studio user
I want to have a page talking about setting Fonts in Pokémon Studio
So that I can learn how to set a default font, different fonts and sizes

Issue description

Recently, we've seen some talks about Fonts in Pokémon Studio, setting a default font (which requires a bit of a hidden manipulation of IDs), creating new fonts, etc...
We could use a proper tutorial page about setting Fonts in Pokémon Studio so that users can check those and have all the required information, be it explanatory enough or more hidden ones.

Tasks

• Talk about creating fonts
  • Talk about setting a default setting (swapping IDs)
• Talk about creating sizes
• Talk about setting specific fonts for scenes
• Talk about setting specific fonts for choices

Notes

This issue is about Pokémon Studio only. Talking about fonts manipulation ingame through PSDK/RMXP might need to be its own page (though this is debatable).