feat(vulkan): vulkan 1.4 core with the user interface and the launcher, shaders split into ogl46/vk14 with SPIR-V binaries loaded first

shaders/vk14/imgui.vert

@@ -0,0 +1,27 @@
+#version 460 core
+#define STAGE_VERTEX 1
+// the user interface (imgui), drawn by vk14::imgui_backend over the image of the window
+
+#include "common.glsl"
+
+layout(location = 0) in vec2 v_position;
+layout(location = 1) in vec2 v_uv;
+layout(location = 2) in vec4 v_colour;
+
+// the pixels of the window to the clip space
+layout(push_constant) uniform ui_transform
+{
+	vec2 scale;
+	vec2 translate;
+} transform;
+
+layout(location = 0) out vec2 f_uv;
+layout(location = 1) out vec4 f_colour;
+
+void main()
+{
+	f_uv = v_uv;
+	// the colours of imgui are srgb; they are mixed in linear light, as the user interface of the opengl renderer does it
+	f_colour = vec4(pow(v_colour.rgb, vec3(2.2)), v_colour.a);
+	gl_Position = vec4(v_position * transform.scale + transform.translate, 0.0, 1.0);
+}