higan rebranding

[near-san]

This is a rebranding pull request.

Originally, higan started becoming two emulators in one:

• an accuracy-focused, complete GUI focused on preservation
• a performance-focused, simplfied GUI focused on features The first became known as "higan-ui"; the second as "byuu"

Later on, the ares emulator split off from higan. The ares emulator's equivalents were "luna" and "lucia".

This rebranding is a counterpart to ares' recent rebranding. The goal is to cleanly separate these two emulators, going forward:

• higan will fulfill the accuracy-focused, complete emulation role
• ares will fulfill the performance-focused, simplified emulation role

Therefore, this pull request makes the following changes to higan:

• removes the "byuu" user interface
• renames the "higan-ui" user interface to simply "higan" ** updates the resource/ files and install/config directories to "higan"
• removes the Nintendo 64 and PlayStation cores this is because they are not accuracy-focused and never will be which is because they are too demanding for true cycle-accuracy
• removes N64 and PS1 support from icarus ** so that unsupported systems don't appear in the import tool
• merges the extras/ folder back to one level (since "byuu" was removed)
• updates Cirrus and github workflows to not build "byuu"
• removes the Super Famicom, PC Engine, and Mega Drive scanline renderers ** as they are not accurate compared to the pixel renderers
• removes the PC Engine audio decimation performance hack
• removes the Game Boy Advance lazy-synchronization performance hack
• removes the profile= build directive
• updates my name to Near in various readme files and source code headers

Not related to this diff, but from the other side with ares:

• the "luna" user interface was removed
• the "lucia" user interface was renamed to simply "ares"
• it is build with the performance profiles
• it now contains the N64 and PS1 cores exclusively

With these changes, a lot of confusion and overlap is eliminated. Each emulator now stands on its own and serves different purposes.

This is a major restructuring, so it's possible this PR isn't perfect. We may need to commit a few small fixes after merging this to finish the task.

[Kawa-oneechan]

Sounds good to me. Screw?

[Screwtapello]

The changes look good to me!

I squashed the commits and edited the commit message a bit; assuming all the builds pass, I'll hit the merge button unless somebody beats me to it.

[Screwtapello]

Thank you, Near, for doing all the hard work for this PR!

[near-san]

Thank you! I'm very happy you guys are okay with this proposal.

I made quite a mess of the naming, but I really have a good feeling about this and the new domains getting us back on track with a simpler story. The key will just be to stick with this consistently and in a couple years it should work itself out.

We can close #6 #7 #27 #30 #76 #77 #83 #119 #127 #143 here now. We can also simplify #39 now.