Add support for SVG add-on logos

[florian-h05]

Currently, Main UI attempts to load all add-on logos as PNG (the add-on logo url is generated using the add-on name and expecting a PNG).

This PR adds support for SVG add-on logos, which means:
The UI will now attempt to load a SVG logo,
if that fails, it will attempt to load a PNG,
and if that fails, fall back to the add-on‘s default logo (which is dependent on the add-on type).

[relativeci]

Job #1653: Bundle Size — 11.01MiB (-0.01%).

aa74637(current) vs def6eff main#1652(baseline)

Warning

Bundle contains 19 duplicate packages – View duplicate packages

Bundle metrics   2 changes

	Current Job #1653	Baseline Job #1652
Initial JS	1.85MiB	1.85MiB
Initial CSS	607.89KiB	607.89KiB
Cache Invalidation	17.01%	17.59%
Chunks	220	220
Assets	242	242
Modules	3091(+0.1%)	3088
Duplicate Modules	164	164
Duplicate Code	1.77%	1.77%
Packages	150	150
Duplicate Packages	18	18

Bundle size by type   2 changes 2 improvements

	Current Job #1653	Baseline Job #1652
JS	9.2MiB (-0.01%)	9.2MiB
CSS	889.35KiB (-0.01%)	889.44KiB
Fonts	526.1KiB	526.1KiB
Media	295.6KiB	295.6KiB
IMG	140.74KiB	140.74KiB
HTML	1.24KiB	1.24KiB
Other	871B	871B

---

View job #1653 report View florian-h05:addon-logo branch activity View project dashboard

[florian-h05]

@stefan-hoehn I have added a description.
BTW I have taken this PR as a chance to refactor the add-on logo to its own component.

[stefan-hoehn]

I have tested it on final and it retrieves the svgs nicely. Styling looks good and I see nothing that breaks.