Feat(adev): faster initial loading + iPad availability of the playground about angular

[mauriziocescon]

Some other feedback comparing ng-playground with the playground available for other frameworks (solid, vue, svelte). Note: I perfectly understand the current WebContainer limitations, but my feedback is mostly functional.

1. The accessibility of adev-playground from mobile devices (I tested iPhone / iPad) can be very handy in some cases or for some specific categories of users. In particular:

   • teens / education: for teens or in the education sector, it's quite common to find tablets as devices to access internet. In such cases, users can play with the other frameworks, but not with angular.
   • social media sharing: not uncommon to share links to playgrounds... and not uncommon to quickly check them using mobile devices. Again: angular is out.

2. I think the default access to ng-playground (template: Minigame) is overwhelming: IMO it passes the message angular is complicated. There's too much complicated code (imagine: teens, but also react developers curious about the latest changes in angular). I'd personally set the default template to Hello world or something simple. Moreover, I think having the template_id reference in the url might help a lot (target: social media sharing).

My 2 cents!

FYI @twerske - @mgechev