The README had rendering issues on GitHub Mobile due to the "Special Thanks" ("Credits" previously) images not being correctly sized which has been resolved by removing those images. In addition, the badges at the top had unnecessary extra spacing on mobile which was required on desktop and has been fixed by exploiting differential behavior between them regarding nesting HTML line breaks (`<br>`) within a HTML hyperlink tag (`<a>`) which causes a space on desktop while not showing up on mobile.
This commit also refactors the entire file for better readability by changes such as using **bold** to emphasize points and explicit Markdown dividers (`---`) between sections.
A distinct change is clarifying that Skyline is not a Ryujinx derivative as we found a lot of people who thought this by:
* Renaming the "Credits" section to "Special Thanks"
* Explicitly specifying that Skyline is not based on it in **bold** at the end of the description
This commit mainly fixes GroupMutex and clock rescaling. In addition, clock rescaling is no longer performed if the CNTFRQ_EL0 of the host device is same as that of the Switch (19.2MHz) which is fairly common on higher end devices.
