Better handling for color in terminal (#381)

* better handling for color in terminal

* cleanup

* cleanup

* cargo fmt

* clippy + tests

* clean

completions/_dust

@@ -47,6 +47,8 @@ _dust() {
 '--reverse[Print tree upside down (biggest highest)]' \
 '-c[No colors will be printed (Useful for commands like\: watch)]' \
 '--no-colors[No colors will be printed (Useful for commands like\: watch)]' \
+'-C[Force colors print]' \
+'--force-colors[Force colors print]' \
 '-b[No percent bars or percentages will be displayed]' \
 '--no-percent-bars[No percent bars or percentages will be displayed]' \
 '-B[percent bars moved to right side of screen]' \