Init Cargo workspace with three crates: pixstrip-core, pixstrip-gtk, pixstrip-cli

pixstrip-core/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "pixstrip-core"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[dependencies]
+serde = { workspace = true }
+serde_json = { workspace = true }
+thiserror = { workspace = true }

pixstrip-core/src/lib.rs

@@ -0,0 +1,3 @@
+pub fn version() -> &'static str {
+    env!("CARGO_PKG_VERSION")
+}