feat(ir): replace Rpl with GraphIr

Semi-broken as atm the CLI just does nothing except printing the parsed
IR, instead of actually executing it.

crates/rpl/src/instructions/mod.rs

@@ -1,47 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-pub mod read;
-pub mod write;
-
-#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
-pub enum Instruction {
-    Read(read::Read),
-    Write(write::Write),
-    Math(Math),
-    Blend(Blend),
-    Noise(Noise),
-    Filter(Filter),
-}
-
-#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
-pub enum Math {
-    Add,
-    Subtract,
-    Multiply,
-    Divide,
-}
-
-#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
-pub enum Blend {
-    Normal,
-    Multiply,
-    Additive,
-    Overlay,
-    Screen,
-    Subtractive,
-    Difference,
-    Darken,
-    Lighten,
-}
-
-#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
-pub enum Noise {
-    Perlin,
-    Simplex,
-    Voronoi,
-}
-
-#[derive(Serialize, Deserialize, PartialEq, Eq, Debug)]
-pub enum Filter {
-    Invert,
-}