If i'm not mistaken,
you can't.
ReShade uses
ReshadeFX* (similar to HLSL*), while
Shadertoy uses
GLSL*. That's like:
- trying to run c code with a python interpreter
- trying to run a MacOS application on Windows
those are just two examples.
You
could, however,
rewrite the shaders for the ReShade FX* language
*these are shading languages