feat(demo): add more demos

[meeroslav]

• Recursive demo
• Restrictions demo
• Responsive demo

[brandonroberts]

I don't think we need separate demos for each of these. What do you think about rolling them into one demo app?

[meeroslav]

Each one of them is targeting a different feature. It makes it easier for devs to find an example of how to do a specific thing. This could be a base for documentation. Additionally, including E2E tests into CI brings extra checks.

Merging them all together would create a multi-concern app that would be harder to read.

I would, though, remove the getting-started and tour-of-heroes and replace them with demo apps showing the @angular/router working alongside angular-routing and "auxiliary routes" (multiple routers on the same component).

What do you think about this proposal?

[brandonroberts]

That sounds reasonable to me

[meeroslav]

Please merge this one in then and I'll create additional PR for new demos and removal of the two above mentioned