scripts: add ANSI color test script

color-test.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+printf "          "
+for b in $(seq 40 47); do
+    printf "%s" "  ${b}m ";
+done
+
+echo
+for f in "" $(seq 30 37); do
+    for s in "" "1;"; do
+        printf "%4sm" "${s}${f}"
+        printf " \033[%sm%s\033[0m" "$s$f" "gYw "
+        for b in $(seq 40 47); do
+            printf " \033[%s;%sm%s\033[0m" "$b" "$s$f" " gYw "
+        done
+        echo
+     done
+done