feature: isatty on stdout #48
Description
Context
hx does not sense if stdout is being sent to a terminal, hence garbled term codes are output:
$ cat Cargo.toml | hx | more
0x000000: ESC[38;5;91m0x5bESC[0m ESC[38;5;112m0x70ESC[0m ESC[38;5;97m0x61ESC[0m ESC[38;5;99m0x63ESC[0m ESC[38;5;107m0x6bESC[0m ESC[38;5;97m0x61ESC[0m ESC[38;5;103m0x67ESC[0m ESC[38;5;101m0x65ESC[0m ESC[38;5;93m0x5dESC[0m ESC[38;5;10m0x0aESC[0m [package].
Solution
Support sensing of terminal (isatty) on stdout.