Add meson subproject wraps for aml and neatvnc

[Consolatis]

Makes compiling as easy as:
meson build_dir && meson compile -C build_dir

[eli-schwartz]

wayvnc/meson.build

Lines 52 to 69 in 3b26a43

	neatvnc_project = subproject(
	'neatvnc',
	required: false,
	version: neatvnc_version,
	)
	aml_project = subproject('aml', required: false)
	if aml_project.found()
	aml = aml_project.get_variable('aml_dep')
	else
	aml = dependency('aml')
	endif
	if neatvnc_project.found()
	neatvnc = neatvnc_project.get_variable('neatvnc_dep')
	else
	neatvnc = dependency('neatvnc', version: neatvnc_version)
	endif

The use of subprojects as preferred with fallback to system dependencies means that adding a wrap file actually breaks the ability to build with system deps. This may be the reason that they aren't already wrap files.

I would advise nuking all this code though. See https://mesonbuild.com/Wrap-dependency-system-manual.html#provide-section

dependency('foo') should be enough, and simply use a suitable wrap file that specifies a [provide] section. Meson will natively do subproject fallback, and it can even be configured to prefer subprojects using --wrap-mode=forcefallback.