Refactoring

Tried doing some cleanup, mainly:

• Restructured to make obvious distinction between latex code and other stuff
• Removed some confusing comments, commented-out code and likely unusued features
• Removed ancient editor configs that dont really do or help much but bring sensory overload
• Reordered settings file to clarify what needs to be changed by whom
• Removed some more files that probably just add to the noise
• Removed AI declaration as requested by matthias

Some open questions and suggestions where for some reason I wasnt as radical:

• There is still a good bit of commented out code without explanation why or what it does. See e.g. src/FrontBackmatter/Titleback.tex. It would be nice to have config flags to enable them, if still desired to even have them
• is the dict in src/dict even used anywhere? Again I cant find any explicit mention of it
• Are the .eps logos in src/gfx/logos/creativecommons broken (or even still relevant)? I cant open them with Gimp
• Do we need to gitkeep the gfxcompiled directory, is that not automatically created by tikz when caching is done?