docs(core): add documentation for HostListener (#40720)
docs(core): add documentation for HostListener (#40720)

add return value documentations for HostListener callbacks

Closes #40708

PR Close #40720

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