Lots of incorrect diagnostics

[stevenctl]

These are all from the same shader that works just fine in Godot 4.2 stable.

1. invalid shader include directory

#include "./include/Triplanar.gdshaderinc"

2. Invalid arguments for function 'textureLod' (also leads to Expected return type 'float')

float sampleHeight(vec2 uv) {
   return textureLod(heightmap, uv, 0).r * height_scale;
}

3. Type mismatch: 'float' and 'vec3'.

vec3 colorRamp(float value) {
    // Define your color stops
    vec3 colors[32];
    colors[0] = vec3(0.0, 0.0, 0.5);    // Dark Blue
    colors[1] = vec3(1.0, 0.0, 0.0);    // Red
    colors[2] = vec3(0.0, 1.0, 0.0);    // Green
    colors[3] = vec3(1.0, 1.0, 0.0);    // Yellow
...

4. Expected Expression (leads to `Identifier 'colors' is undefined.')

  const uint DEBUG_TEXTURES = uint(8);
  vec3 colors[DEBUG_TEXTURES];

5. Function 'smoothstep' does not exist.

    smoothstep(0.0, 1.0, abs(dot(worldNormal, vec3(1.0, 0.0, 0.0)))),

[GodOfAvacyn]

Thanks for pointing these out. I'm in the middle of a full re-write right now, the new version should be working 100%. Give me another week or two and it'll be on!