[HelpHub] Overhaul Code block documentation

[estelaris]

Article: https://wordpress.org/documentation/article/code-block/

Review full article, follow steps from the [HelpHub] Overhauling blocks articles - READ FIRST
#2126

Open issues

• [HelpHub]: Link Control Page #970
• [HelpHub]: Replace "More rich text editing" content with detailed page link in existing articles [HelpHub]: Replace "More rich text editing" content with detailed page link in existing articles #986
• [HelpHub] Remove More options screenshot from all block pages #713
• [HelpHub] Code block page review [HelpHub] Code block page review #1085

[github-actions]

Heads up @WordPress/docs-issues-coordinators, we have a new issue open. Time to use 'em labels.

[rollybueno]

• [HelpHub]: Link Control Page [HelpHub]: Link Control Page #970
• [HelpHub]: Replace "More rich text editing" content with detailed page link in existing articles [HelpHub]: Replace "More rich text editing" content with detailed page link in existing articles #986
• [HelpHub] Remove More options screenshot from all block pages [HelpHub] Remove More options screenshot from all block pages #713
• [HelpHub] Code block page review [HelpHub] Code block page review #1085

This is done!