feat: add scaleway provider

[fuse]

Generate associated code using autogen.sh

[davidaparicio]

LGTM

[gabriel-tessier]

@fuse
Hi, and thanks for the PR.
Can you check the contributing file, more especially the add new provider section and validate that all the step are done.

https://github.com/mingrammer/diagrams/blob/master/CONTRIBUTING.md#add-new-provider

I quickly check the changes and there's docs/nodes/gis.md that is updated can you revert at least this one to only have the changes related to add Scaleway provider. <--- this comment was edited look like the change in the file is somewhere else you can ignore.

Just small comments :

• About the size of the icons, in the doc it's minimum 256 px, may need to resize your icons.
• About the naming all files start with capital case which generate node name like this: Accountexperience
  and in your code you will go with

from diagrams.scaleway.account import Accountexperience

Should be better like this:

from diagrams.scaleway.account import AccountExperience

Also you can use alias. If you have questions or things that you don't get, just ask, we are here to help.