[9.x] Adds compileReadonly function

[mahmoudmohamedramadan]

This PR adds compileReadonly function

[taylorotwell]

Hmm - I wonder how many more HTML attributes we would possibly add directives for 😨 I'm worried we will get too many.

[DarkGhostHunter]

@if($condition) readonly @endif.

If there is minimal keystrokes saved without tackling verbosity, I reject.

At this point, I think is just better to create a package to handle forms separately.

[mahmoudmohamedramadan]

@taylorotwell maybe you are right but actually, not all HTML attributes will be rendered to directives because the attributes that must be rendered must have a common use like @readonly which is similar to @disabled it's common to check about something to apply these attributes So, it'll be nice to render these attributes to directives in Laravel because Laravel tries to make everything awesome and easier.

[mahmoudmohamedramadan]

@DarkGhostHunter the same thing can be applied to @disabled and @selected because we can use @if($condition) disabled @endif also the same thing with @selected but I see that it'll be nice if we use minimal keystrokes to handle these scenarios.

[taylorotwell]

I looked over the attributes - looks like there isn't much of anything remaining after this.