Installer sounds and embedded player. (#29)

* Embedded player implementation.

* Rework embedded sound player to support simultaneous playback.

* Add more embedded sounds.

* Update submodule.

* Update.

* Move engine initialization.

* Use guest audio configuration values in embedded player.

* Miniaudio submodule on dev branch.

* Implement libvorbis.

* Update resources submodule.

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Co-authored-by: Skyth <19259897+blueskythlikesclouds@users.noreply.github.com>

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "thirdparty/msdf-atlas-gen"]
 	path = thirdparty/msdf-atlas-gen
 	url = https://github.com/Chlumsky/msdf-atlas-gen.git
+[submodule "thirdparty/miniaudio"]
+	path = thirdparty/miniaudio
+	url = https://github.com/mackron/miniaudio