build(docs-infra): add a box around CLI command line reference syntax (#43850)
build(docs-infra): add a box around CLI command line reference syntax (#43850)

This commit helps to make the section that describes an overview of the syntax of a CLI command stand out from the surrounding text.

Closes #26574

PR Close #43850

angular-indonesia/angular,manekinekko/angular,gkalpak/angular,angular-indonesia/angular,JiaLiPassion/angular,angular-indonesia/angular,manekinekko/angular,shairez/angular,brandonroberts/angular,JiaLiPassion/angular,ocombe/angular,gnomeontherun/angular,angular/angular,manekinekko/angular,brandonroberts/angular,shairez/angular,brandonroberts/angular,gnomeontherun/angular,ocombe/angular,JiaLiPassion/angular,JiaLiPassion/angular,angular-indonesia/angular,angular/angular,ocombe/angular,angular/angular,gkalpak/angular,brandonroberts/angular,ocombe/angular,manekinekko/angular,ocombe/angular,gkalpak/angular,gnomeontherun/angular,manekinekko/angular,shairez/angular,shairez/angular,manekinekko/angular,angular/angular,gnomeontherun/angular,brandonroberts/angular,shairez/angular,gkalpak/angular,brandonroberts/angular,ocombe/angular