Notable changes

• have a working command line, but still have improvements
  • tab autocomplete mostly works
• file operations now work properly most of the time with a proper progression bar
• certain keys are now mappable (e.g. backspace, tab, enter)

TODOs

• command line should not have to use quotes to escape spaces and such like ranger
• command line doesn't show run off text
• preview support is still not performing well
• listen for fs changes so directory contents are up to date