Edit navigation format

[tatarianBarbarian]

This one changes navigation format to new one that described in #25 (comment)

Added new test environment -- project with multiple entry points.

Also changed templates.
Now navigation looks the same as before for single entry point, but for multiple entries it looks like this:

[tatarianBarbarian]

To make it a bit more clear: Nanostores has one entry point which accumulates other index.d.ts from file like map, atom, etc.

I set up new environment by picking some of them from these folders, not from the root index.d.ts.

[tatarianBarbarian]

There is also new problem related to Astro and TypeDoc -- if project for documentation is on upper level, then TypeDoc generates it's name with _ symbol. So we getting following structure:

Which is not working for Astro. It works only with folders without any underscores for pages.
Will fix it with another PR.

[ai]

To make it a bit more clear: Nanostores has one entry point which accumulates other index.d.ts from file like map, atom, etc.

For Nano Stores we will need to use index.d.ts from nanostores, @nanostores/router, etc. Can we add it to the test (to be sure that atom from nanostores and atom from @nanostores/router will be the same?

[tatarianBarbarian]

Sure, I'll add it then.