Added shader loading, added glad

assets/shaders/test.frag

@@ -0,0 +1,11 @@
+#version 330 core
+out vec4 FragColor;
+
+in vec2 TexCoord;
+uniform sampler2D uniform_Texture;
+
+void main() {
+  vec4 color = texture(uniform_Texture, TexCoord);
+  FragColor = color;
+  // FragColor = vec4(1, 1, 1, 1);
+}