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/ir/src/instruction/mod.rs

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

crates/ir/src/instruction/read.rs

@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Read {
+    pub source: SourceType,
+    pub format: SourceFormat,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum SourceType {
+    File(PathBuf),
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum SourceFormat {
+    Jpeg,
+    Png,
+}

crates/ir/src/instruction/write.rs

@@ -0,0 +1,19 @@
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct Write {
+    pub target: TargetType,
+    pub format: TargetFormat,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum TargetType {
+    File(PathBuf),
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum TargetFormat {
+    Jpeg,
+    Png,
+}