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/zinit/zinit_basic2.rhai

@@ -0,0 +1,41 @@
+// Basic example of using the Zinit client in Rhai
+
+// Socket path for Zinit
+let socket_path = "/tmp/zinit.sock";
+
+// Create a new service
+print("\nCreating a new service:");
+let new_service = "rhai-test-service";
+let exec_command = "echo 'Hello from Rhai'";
+let oneshot = true;
+
+let result = zinit_create_service(socket_path, new_service, exec_command, oneshot);
+print(`Service created: ${result}`);
+
+// Monitor the service
+print("\nMonitoring the service:");
+let monitor_result = zinit_monitor(socket_path, new_service);
+print(`Service monitored: ${monitor_result}`);
+
+// Start the service
+print("\nStarting the service:");
+let start_result = zinit_start(socket_path, new_service);
+print(`Service started: ${start_result}`);
+
+// Get logs for a specific service
+print("\nGetting logs:");
+let logs = zinit_logs(socket_path, new_service);
+
+for log in logs {
+    print(log);
+}
+// Clean up
+print("\nCleaning up:");
+let stop_result = zinit_stop(socket_path, new_service);
+print(`Service stopped: ${stop_result}`);
+
+let forget_result = zinit_forget(socket_path, new_service);
+print(`Service forgotten: ${forget_result}`);
+
+let delete_result = zinit_delete_service(socket_path, new_service);
+print(`Service deleted: ${delete_result}`);