Split engine to packages NazaraUtils and NZSL (#375)

* Move code to NazaraUtils and NZSL packages

* Reorder includes

* Tests: Remove glslang and spirv-tools deps

* Tests: Remove glslang init

* Remove NazaraUtils tests and fix Vector4Test

* Fix Linux compilation

* Update msys2-build.yml

* Fix assimp package

* Update xmake.lua

* Update xmake.lua

* Fix shader compilation on MinGW

* Final fixes

* The final fix 2: the fix strikes back!

* Disable cache on CI

* The return of the fix™️

tools/shadernodes.lua

@@ -103,7 +103,8 @@ if has_config("shadernodes") then
 		set_kind("binary")
 		add_rules("qt5.moc")
 
-		add_deps("NazaraShader")
+		add_deps("NazaraCore")
+		add_packages("nzsl")
 		add_packages("nodeeditor")
 		add_packages("qt5core", "qt5gui", "qt5widgets")
 		if not is_plat("windows") then