Add a FAQ page

Summary

This is a feature request for a new documentation page with Frequently Asked Questions

Steps to reproduce

Expected behaviour:

1. Ask yourself a question concerning Giro3D/Piero
2. Look into the webpage
3. Find the answer on the FAQ page and be happy

Actual behaviour:

1. Ask yourself a question
2. Look into the webpage
3. Do not find the answer and be sad

Informations

• Giro3D version: any
• Browser (Firefox, Chrome, Opera, Safari...) and version: any
• OS (Linux, MacOS, Windows...)

Screenshots

N/A