Complete parts and assembly wiki section

[jurra]

For better use experience we need to make the list of parts documented, with links to their location in the repository, and ideally with pictures:
Some of this tasks can be left for other contributors like @memeco so that they can have room to do one of the documentation tasks:

• Download files, and open them of freeCAD
• Take pictures of each part and upload them in the repo
• Take pictures of the general assembly
• Make a table in markdown with the different parts pointing to the file url on the repo #mozsprint

[polemidis]

I believe we have all the pictures of the parts taken, right? Then we can close this issue too?