refactor: split frag0 into multiple files

default/frag7.glsl

@@ -1,4 +1,4 @@
-#include frag0.glsl
+#version 460
 
 // A+B
 // ------------
@@ -9,6 +9,14 @@
 in vec2 vUV;
 out vec4 fragColor;
 
+#include inc_magic.glsl
+#include inc_functions.glsl
+
+uniform sampler2D iTex7;
+uniform sampler2D iTex8;
+uniform int iSeed7;
+uniform vec3 iMidi3_1[2];
+
 void main() {
     float mix_value = magic(iMidi3_1[1].xy, vec3(1, 0, 0), iSeed7);
     bool mix_type = magic_trigger(vec3(iMidi3_1[0].x, 0, 0), iSeed7 + 10);