Change build system to CMake

According to my own documentation, the project tree should look entirely
different. Also, it should use CMake instead of Make. This commit
introduces changes that will make my project tree to adhere to my
own documentation.

Graphics/shaders/shader.frag

@@ -0,0 +1,8 @@
+#version 450
+
+layout(location = 0) in vec3 fragColor;
+layout(location = 0) out vec4 outColor;
+
+void main() {
+    outColor = vec4(fragColor, 1.0);
+}