* remove current user name
* rename /accept to /connect, remove /chat, add /reset, allow 1-letter abbreviations
* update help
* /delete contact, separate response for confirmation
* update invatation instruction
* unset active contact only if it is the same as current
* windows-compatible getChar without buffering, option to use terminal without editing
* option to choose terminal mode, conditional compilation for Windows
* conditional extension
* add basic terminal mode (no contact insertion)
* option help
* separate terminal IO to separate thread via queues
* terminal input arithmetics (WIP)
* editable multiline terminal input
* print messages above input area
* support Up/Down arrows
* terminal chat: move by word, move to the beginning/end of input
* insert active contact when typing starts
* refactor inserting active contact
* highlight "to contact"
* add username to prompt
* change beginning/end of line keys to shoft-arrow
* remove unused code
* add ctrl arrow key bindings
* add comment for debugging keys in terminal
Co-authored-by: Efim Poberezkin <efim.poberezkin@gmail.com>
