A command-line shell with superpowers. WIP.

Every command is provided their own PTY, which then can be rendered to the screen, saved or manipulated independently.

• Run a command with virtual std{err,stdout,in}.
• Parse the output for (some) escape sequences, and render them on a virtual framebuffer.
  • Randomized-testing against tmux, so we at least know that the escape codes work sanely.

• Allow interacting with the running program. Show the live output, pass the user input.
• Complete-enough support for escape sequences.
• REPL

• Time-travelling scrollback
• Highlight stderr/stdout differently
• Bash-like command language
• Expand/collapse previous command output
• Use previous commands output on the next command
• History (both the command and outputs)
• Integrated pv
• Extension support (likely using lua)

• Linux console escape and control sequences: https://man7.org/linux/man-pages/man4/console_codes.4.html
• Summary of ANSI standards for ASCII terminals: https://www.inwap.com/pdp10/ansicode.txt
• hTerm control sequences: https://chromium.googlesource.com/apps/libapps/+/a5fb83c190aa9d74f4a9bca233dac6be2664e9e9/hterm/doc/ControlSequences.md