Documentation improvement suggestions

[skurfuerst]

Describe the bug

The docs which existed were totally understandable etc; but I missed the following things:

• an introduction to services in the main menu here next to "languages": https://devenv.sh/languages/
• some a bit more in depth examples on "languages" how you can customize languages
• some more complete examples for full applications.
• Bonus: some example/explanation about extensibility

Generally, I first thought that devenv.sh can maybe do 20% of what it can really do from first skimming the docs; only when I discovered https://devenv.sh/reference/options/, I saw how powerful it really is.

[MatrixManAtYrService]

I wonder if there's a way to compile a list of projects using devenv. Exploring their configurations would be very helpful, and perhaps less work than creating examples.

[skurfuerst]

That would be useful :)

[skurfuerst]

I know about https://github.com/kellerkinderDE/devenv-shopware and

https://github.com/sandstorm/devenv-neos (my own).

All the best!

[domenkozar]

I've pushed ce36bb6cebedfdfd19e4043836d51bde8b3c1419 that adds services and improve docs on languages.

We still need to write a guide how to customize devenv and provide more examples.

[domenkozar]

cc @k3yss: ideally we'd have something like languages.python.doc that would describe how the language bits are used and then we'd render that in the manual.

[domenkozar]

Finally done! Thank you.