Create sysd crate with initial implementation

This commit introduces a new Rust crate named "sysd" with a basic implementation that includes a function to add two unsigned 64-bit integers. Additionally, a test is provided to verify the functionality of the add function. The crate's configuration is defined in Cargo.toml, establishing its name, version, and edition.

Author: imggion

crates/sysd/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "sysd"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

crates/sysd/src/lib.rs

@@ -0,0 +1,14 @@
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}