Maybe switch back to template without subtemplates?

[Andrew15-5]

@ealmloff once said:

I don't think we should be using sub templates in the dioxus-template repo because we want to support multiple platforms at once in the future
But it is fine for now

When I opened #26 and created #27 there were no subtemplates and dx didn't support it until recently (DioxusLabs/dioxus#1872). But the default subtemplate (with --yes) can't be selected yet (cargo-generate/cargo-generate#1181). I don't know about #26, but #27 is now useless, and it looks like I can remove it. Another (small) problem is that LiveView's template name should be changed (small breaking change for those that already use dx new --subtemplate or cargo-generate).

One (and only?) noticeable disadvantage of not having subtemlates is that this significantly increases the number of conditions in files (and to fix #26 the way conditions are inserted in #27 isn't very nice, but manageable).

Related: #9.