Enable color output in our Linux and macOS CI tests (#1939)

Co-authored-by: Rangi <sylvie.oukaour+rangi42@gmail.com>

.github/workflows/create-release-docs.yml

@@ -4,6 +4,12 @@ on:
     types:
       - released # This avoids triggering on pre-releases
 
+env:
+  # Force colored output (see https://bixense.com/clicolors/ and https://force-color.org/)
+  TERM: xterm-256color
+  CLICOLOR: 1
+  CLICOLOR_FORCE: 1
+
 jobs:
   build:
     if: github.repository_owner == 'gbdev'