docs(dev-infra): update format commands described in DEVELOPER.md (#36910)
docs(dev-infra): update format commands described in DEVELOPER.md (#36910)

This commit updates DEVELOPER.md to describe the latest formatting
command 'ng-dev' and removed deprecated 'gulp' command.

Fixes #36909

PR Close #36910

gkalpak/angular,wKoza/angular,matsko/angular,manekinekko/angular,wKoza/angular,ocombe/angular,gnomeontherun/angular,matsko/angular,matsko/angular,alxhub/angular,gnomeontherun/angular,mgechev/angular,IdeaBlade/angular,ocombe/angular,gnomeontherun/angular,angular/angular,brandonroberts/angular,angular-indonesia/angular,mgechev/angular,JiaLiPassion/angular,brandonroberts/angular,shairez/angular,filipesilva/angular,blesh/angular,ocombe/angular,angular-indonesia/angular,filipesilva/angular,gdi2290/angular,wKoza/angular,shairez/angular,gdi2290/angular,JiaLiPassion/angular,alxhub/angular,filipesilva/angular,blesh/angular,JiaLiPassion/angular,wKoza/angular,gkalpak/angular,gdi2290/angular,alxhub/angular,mgechev/angular,angular/angular,matsko/angular,shairez/angular,filipesilva/angular,IdeaBlade/angular,mgechev/angular,ocombe/angular,gnomeontherun/angular,shairez/angular,alxhub/angular,angular-indonesia/angular,gkalpak/angular,JiaLiPassion/angular,gdi2290/angular,manekinekko/angular,manekinekko/angular,IdeaBlade/angular,brandonroberts/angular,blesh/angular,IdeaBlade/angular,shairez/angular,wKoza/angular,manekinekko/angular,ocombe/angular,gdi2290/angular,filipesilva/angular,mgechev/angular,alxhub/angular,ocombe/angular,IdeaBlade/angular,blesh/angular,manekinekko/angular,matsko/angular,blesh/angular,angular/angular,gkalpak/angular,gdi2290/angular,brandonroberts/angular,manekinekko/angular,wKoza/angular,brandonroberts/angular,angular/angular,brandonroberts/angular,angular-indonesia/angular