Documentation footer

In addition to the edit me button at the top of the page and the general information in the footer, it may also be useful to have an additional documentation footer similar to the one on GitHub.

_This is an extension of #46_

### Content:

* Quick way to give feedback using a form: I expeced this, I missed that, I liked that
* "Edit me" button to quickly edit the page and date of the last edit (Same as top of the page)
* Quick link to the [FAQ](https://precice.discourse.group/tag/faq) + discourse category based on where we are in the documentation:

Documentation Section | Discourse Category
--- | ---
[Fundamentals](https://precice.org/configuration-acceleration.html#) | Is preCICE for me?
[Installation](https://precice.org/configuration-acceleration.html#) | Installing preCICE
[Configuration](https://precice.org/configuration-acceleration.html#) | Using preCICE
[Tooling](https://precice.org/configuration-acceleration.html#) | ?
[Provided adapters](https://precice.org/configuration-acceleration.html#) | Official adapters and tutorials
[Couple your code](https://precice.org/configuration-acceleration.html#) | Using preCICE
[Running simulations](https://precice.org/configuration-acceleration.html#) | Using preCICE
[Dev docs](https://precice.org/configuration-acceleration.html#) | _hide_
[Documentation meta](https://precice.org/configuration-acceleration.html#) | _hide_

### Example GitHub footer

_Note: The suggestion is supposed to be less busy_



### Extra

Something similar may be useful for the tutorials too.
This is supposed to go above the normal footer.