docs(forms): add diff between add and set control (#42638)
docs(forms): add diff between add and set control (#42638)

PR Close #42638

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