All features tracking list

[williamhCode]

• add braille rendering
• variable spacing between lines
• add box drawing chars (all box drawing + box elements implemented)
• add command-line/startup options
• add input ime (have to fix this first - SDL stops sending key events if key compositions/ime ui related actions are being processed libsdl-org/SDL#10486)
• add emoji rendering
• add default glyph fallback for glyphs not found in guifont
• add ligatures
• remember window size
• hide cursor when inputting (sdl explodes, so hold back for now)
• add debug mode (window and frame rate information)
• buffer specific font size
• detachable sessions
• proper logging (implement stacktrace and levels) or maybe not depends