renderer/opengl: Extract shaders from source (#9600)

---------

Co-authored-by: Mihai Fufezan <mihai@fufexan.net>

scripts/generateShaderIncludes.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+SHADERS_SRC="./src/render/shaders/glsl"
+
+echo "-- Generating shader includes"
+
+if [ ! -d ./src/render/shaders ]; then
+	mkdir ./src/render/shaders
+fi
+
+echo '#pragma once' > ./src/render/shaders/Shaders.hpp
+echo '#include <map>' >> ./src/render/shaders/Shaders.hpp
+echo 'static const std::map<std::string, std::string> SHADERS = {' >> ./src/render/shaders/Shaders.hpp
+
+for filename in `ls ${SHADERS_SRC}`; do
+	echo "--	${filename}"
+	
+	{ echo 'R"#('; cat ${SHADERS_SRC}/${filename}; echo ')#"'; } > ./src/render/shaders/${filename}.inc
+	echo "{\"${filename}\"," >> ./src/render/shaders/Shaders.hpp
+	echo "#include \"./${filename}.inc\"" >> ./src/render/shaders/Shaders.hpp
+	echo "}," >> ./src/render/shaders/Shaders.hpp
+done
+
+echo '};' >> ./src/render/shaders/Shaders.hpp