[Request] add option not to use 2 different Logos

# Feature Request
I would love to have the option not to use two different Logos.
Would appreceate it much if I would have the option to **always** just have one Logo (SVG and **inline**!) and decide how it looks by just changing the css class.

I already use SVGs
- one for normal
- one for inverted
but they both are getting loaded external.

I would like to just use one inline SVG Logo which I will be able to edit by the class which gets added to the doom.
So I'm also able to animate it. But Inline SVG is atm not possible for the Logo in the Header Menu.

This request does aim for two options:

- option to disable second Logo and just use one.
- option to use inline SVG as its the future and is animatable

Thanks in advance

Start at the Header Menu logo rendering and inspect how the normal and inverted SVG logos are currently loaded externally. Define how the two requested options should affect logo selection and inline rendering, including CSS-class control and animation support. Done means one configurable inline SVG can replace the two-logo behavior without breaking the existing header.

Written by the indexing model from the issue text.