refactor(build.zig): examples can be run independently & sysaudio exmples renamed as tests

[RonaldZielaznicki]

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Changes

• Separated example compile/install from b.getInstallStep()
  • Allows for building individual examples without others
• Moved core tests out core folder
  • But, renamed them with a core- prefix
• Renamed SysAudio examples as tests
• Fixed deprecated call to std.mem.split within SysAudio's sine test case

Pics

Before

After

[slimsag]

Thanks! This looks like a great improvement

Also, very minor nit but in general I try to keep PR and commit titles in this form:

<code area>: what the change does

e.g.

build: make examples run independently; rename sysaudio examples to tests

build: windows: fix the build

core: improve window title API

core: macOS: fix window creation

etc. etc.

Primary reason I don't like the conventional commits is it reminds me of too many low quality JS projects 😝

[RonaldZielaznicki]

@slimsag

Hah, I got into the habit because a previous employer had us using them. Despite being a python stack.

I can switch it up.

[RonaldZielaznicki]

Should be good to merge soon as the CI clears it.