add base package

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "char"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "char"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+color_eyre = { workspace = true }
+
+[workspace]
+members = ["crates/char_core"]
+
+[workspace.dependencies]
+color_eyre = "*"

crates/char_core/.gitignore

@@ -0,0 +1,2 @@
+/target
+/Cargo.lock

crates/char_core/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "char_core"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

crates/char_core/src/lib.rs

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+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}

src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}