Logo-handling class and remote fetching of Ouranos logos

[Zeitsperre]

Pull Request Checklist:

• This PR addresses an already opened issue (for bug fixes / features)
  • This PR fixes Standardized folders for logos and badges #115 and fixes Figanos should rescale logos/images to fit the intended purpose #123
• (If applicable) Documentation has been added / updated (for bug fixes / features).
• (If applicable) Tests have been added.
• HISTORY.rst has been updated (with summary of main changes).
  • Link to issue (:issue:number) and pull request (:pull:number) has been added.

What kind of change does this PR introduce?

• Adds a Logos class for setting and installing logos to be used
• Changes the behaviour of plot_logo() to accept a pathlib.Path to a location on disk or a str identifying an installed logo.
• Added some documentation in usage.rst and some markdown cells in figanos_docs.ipynb better detailing how the logos are installed and used.
• Added an image rescaling function for resizing logos or images using scikit-image.

Does this PR introduce a breaking change?

Yes. The Ouranos logos are not installed by default and will be removed from the repository and fetched on request from the Ouranosinc/.github repo. The Figanos logo is installed by default now.

We also now depend on scikit-image for image resizing.

Other information:

Some things that are missing so far:

• Integration of the Logos class into the matplotlib functions.
• Scaling of the logos according to the size of the output figures (Is this implemented? Yes)
  • Scaling is related to the size of the PNGs
  • Alrighty then, we have an entirely new system in place.
• Documentation detailing how this works

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[Zeitsperre]

This PR is complete IMO. The notebook shows failures since I killed one cell when running on my local machine. My other PR (#121) tries to fix this up in sphinx/RTD.

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juliettelavoie commented on 2023-10-10T20:57:43Z
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Can we set 'ouranos_logo_vertical_couleur' as the default when installing it ?

Zeitsperre commented on 2023-10-10T21:51:29Z
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This is now the case.

[Zeitsperre]

This is now the case.

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[sarahclaude]

The ouranos logo installation works great and it's nice to have all the other options (black, white, etc).
Using pathlib.Path(path in string) doesn't seems to work for me. Should I use pathlib another way?
Also, the error mesage due to the path not working tells me no logo are installed but this is not really the case as I am trying to show another logo than the installed one.

[Zeitsperre]

We now support SVGs:

[sarahclaude]

L'ajout de logo avec Pathlib.Path fonctionne et le logo de défaut installé aussi!
Je suppose que le "blurry" du logo d'Ouranos serait corrigé avec le fichier .svg envoyé par Sarah (plutôt que l'utilisation de .png)?