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/_archive/process_long.rhai

@@ -0,0 +1,14 @@
+let x=0;
+while x < 100 {
+
+    run(`
+        find /
+        ls /
+        `);
+    // sleep(100);
+
+    x=x+1;
+
+}
+
+"Process Management Test Success - All tests passed"