Snippets with variable region type (with or without '//') + Color for regions

[KasperDeSmedt]

• Added custom coloring for regions:
  • ALTB.RegionColor: color for region markers (e.g. #region)
  • ALTB.RegionTextColor: color for text after the region markers
• Snippets now use regions without '//' if ALTB.UseAlRegions is true and runtime in app.json >= 6.0
  • Snippets will no longer work with the 'Insert Snippet' command
• Added command ALTB: Add region
  • Adds region arround the currend selection
• [BugFix] Quick fix for AL0666 now only adds '//' for regions (use to do it for all "preprocessor directives")

[KasperDeSmedt]

Added Option to disable snippets + update changelog & readme