feat: update Tutunota, rebranding as Tuta

[rdwz]

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• I agree to follow the Code of Conduct that this project adheres to.

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Description of Change

Tutanota got rebranded as Tuta

This PR includes:

• name changed
• alias added
• icon replaced
• serviceUrl updated
• id unchanged

[rdwz]

Todo

• open migration in ferdium-app instead of browser

according to #1445

There is an option to migrate saved credentials and a link is shown to do so, but

• it wont't work when opened in browser
• needs to be opened in ferdium-app

[mydarkstar]

If you don't mind, I would prefer merging #463 instead, as it is pretty much the same and does not change the logo, as described in the PR comments (Tuta just inverts all colors for dark mode).

[mydarkstar]

Thanks for the help, Marc! I appreciate it lots.
I merged the previous PR of this, and you should see the service name update shortly!

We're also updating the broken link you noticed in the PR template in #469.
Have a good evening!

Duplicate of #463

[rdwz]

If you don't mind, I would prefer merging #463 instead, as it is pretty much the same and does not change the logo, as described in the PR comments (Tuta just inverts all colors for dark mode).

But this is the look of Tuta Mail, there is no other light mode with the old colors. All screenshots advertising the service show this new neon green look: https://tuta.com

[mydarkstar]

there is no other light mode with the old colors

There are three color schemes available: Light (red on white), Dark (inverted colors), and Blue (blue on white).
The Dark mode simply inverts the colors and this is not the "new" Tuta logo. It has also inverted the colors long before the rebranding, therefore this is not a new change.

All screenshots advertising the service show this new neon green look

If you scroll down on the main website you linked and select the "Contacts" screenshot, it is shown in Light mode, with the non-inverted colors:

I appreciate your input on this matter! However, I have to disagree, as there was definitely no logo change.
The way Tuta chose to implement the Dark mode in their products is unfortunate.

If you would like to use the inverted logo out of preference, do set a custom icon for your service of course!