feat: reorganize examples and add signature support to JobBuilder

- Reorganized examples into osiris/, sal/, and utils/ folders
- Moved hardcoded scripts to separate .rhai files
- Added signature() method to JobBuilder for job signing
- Updated OSIRIS context to use block_in_place instead of runtime
- Removed runtime field from OsirisContext
- Added typed save() methods for Note and Event objects
- Updated all examples to use new structure and APIs

examples/sal/scripts/containers/buildah_run.rhai

@@ -0,0 +1,44 @@
+
+// Now use nerdctl to run a container from the new image
+println("\nStarting container from the new image using nerdctl...");
+
+// Create a container using the builder pattern
+// Use localhost/ prefix to ensure nerdctl uses the local image
+let local_image_name = "localhost/custom-golang-nginx:latest";
+println(`Using local image: ${local_image_name}`);
+
+// Import the image from buildah to nerdctl
+println("Importing image from buildah to nerdctl...");
+process_run("buildah", ["push", "custom-golang-nginx:latest", "docker-daemon:localhost/custom-golang-nginx:latest"]);
+
+let tag_result = nerdctl_image_tag("custom-golang-nginx:latest", local_image_name);
+
+// Tag the image with the localhost prefix for nerdctl compatibility
+// println(`Tagging image as ${local_image_name}...`);
+// let tag_result = bah_image_tag(final_image_name, local_image_name);
+
+// Print a command to check if the image exists in buildah
+println("\nTo verify the image was created with buildah, run:");
+println("buildah images");
+
+// Note: If nerdctl cannot find the image, you may need to push it to a registry
+// println("\nNote: If nerdctl cannot find the image, you may need to push it to a registry:");
+// println("buildah push localhost/custom-golang-nginx:latest docker://localhost:5000/custom-golang-nginx:latest");
+// println("nerdctl pull localhost:5000/custom-golang-nginx:latest");
+
+let container = nerdctl_container_from_image("golang-nginx-demo", local_image_name)
+    .with_detach(true)
+    .with_port("8081:80")  // Map port 80 in the container to 8080 on the host
+    .with_restart_policy("unless-stopped")
+    .build();
+
+// Start the container
+let start_result = container.start();
+
+println("\nWorkflow completed successfully!");
+println("The web server should be running at http://localhost:8081");
+println("You can check container logs with: nerdctl logs golang-nginx-demo");
+println("To stop the container: nerdctl stop golang-nginx-demo");
+println("To remove the container: nerdctl rm golang-nginx-demo");
+
+"Buildah and nerdctl workflow completed successfully!"