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_silent.rhai

@@ -0,0 +1,22 @@
+print("Running a command using run().silent().execute()...\n");
+
+// This command will print to standard output and standard error
+// However, because .silent() is used, the output will not appear in the console directly
+let result = run("echo 'This should be silent stdout.'; echo 'This should be silent stderr.' >&2; exit 0").silent().execute();
+
+// The output is still captured in the CommandResult
+print(`Command finished.`);
+print(`Success: ${result.success}`);
+print(`Exit Code: ${result.code}`);
+print(`Captured Stdout:\\n${result.stdout}`);
+print(`Captured Stderr:\\n${result.stderr}`);
+
+// Example of a silent command that fails (but won't halt because we only suppress output)
+// let fail_result = run("echo 'This is silent failure stderr.' >&2; exit 1").silent().execute();
+// print(`Failed command finished (silent):`);
+// print(`Success: ${fail_result.success}`);
+// print(`Exit Code: ${fail_result.code}`);
+// print(`Captured Stdout:\\n${fail_result.stdout}`);
+// print(`Captured Stderr:\\n${fail_result.stderr}`);
+
+print("\nrun().silent() example finished.");