created example lib for sake of testing

lib_example/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "lib_example"
+version.workspace = true
+edition.workspace = true
+
+[dependencies]

lib_example/src/lib.rs

@@ -0,0 +1,5 @@
+#![no_std]
+
+pub fn add_nums(x: i32, y: i32) -> i32 {
+    x + y
+}