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/process/run_log.rhai

@@ -0,0 +1,13 @@
+print("Running a command using run().log().execute()...");
+
+// The .log() method will print the command string to the console before execution.
+// This is useful for debugging or tracing which commands are being run.
+let result = run("echo This command is logged").log().execute();
+
+print(`Command finished.`);
+print(`Success: ${result.success}`);
+print(`Exit Code: ${result.code}`);
+print(`Stdout:\n${result.stdout}`);
+print(`Stderr:\n${result.stderr}`);
+
+print("run().log() example finished.");