implement invert instruction

crates/executor/src/debug/instructions/mod.rs

@@ -1,4 +1,4 @@
-pub mod Read {
+pub mod read {
     use image::{io::Reader as ImageReader, DynamicImage};
     use rpl::instructions::read::{Read, SourceType};
 
@@ -12,7 +12,7 @@ pub mod Read {
     }
 }
 
-pub mod Write {
+pub mod write {
     use image::{io::Reader as ImageReader, DynamicImage, ImageFormat};
     use rpl::instructions::write::{TargetFormat, TargetType, Write};
 
@@ -28,3 +28,14 @@ pub mod Write {
         );
     }
 }
+
+pub mod filters {
+    pub mod invert {
+        use image::DynamicImage;
+
+        pub fn invert(mut input_data: DynamicImage) -> DynamicImage {
+            input_data.invert();
+            input_data
+        }
+    }
+}