feat: Add CI/CD workflows for testing and publishing SAL crates

- Add a workflow for testing the publishing setup
- Add a workflow for publishing SAL crates to crates.io
- Improve crate metadata and version management
- Add optional dependencies for modularity
- Improve documentation for publishing and usage

kubernetes/tests/rhai_tests.rs

@@ -55,6 +55,13 @@ mod rhai_tests {
 
     #[test]
     fn test_rhai_function_signatures() {
+        if !should_run_k8s_tests() {
+            println!(
+                "Skipping Rhai function signature tests. Set KUBERNETES_TEST_ENABLED=1 to enable."
+            );
+            return;
+        }
+
         let mut engine = Engine::new();
         register_kubernetes_module(&mut engine).unwrap();
 
@@ -242,6 +249,13 @@ mod rhai_tests {
 
     #[test]
     fn test_rhai_error_handling() {
+        if !should_run_k8s_tests() {
+            println!(
+                "Skipping Rhai error handling tests. Set KUBERNETES_TEST_ENABLED=1 to enable."
+            );
+            return;
+        }
+
         let mut engine = Engine::new();
         register_kubernetes_module(&mut engine).unwrap();