feat: simplify OpenRPC API and reorganize examples

- Simplified RunnerConfig to just name, command, and optional env
- Removed RunnerType and ProcessManagerType enums
- Removed db_path, redis_url, binary_path from config
- Made runner name also serve as queue name (no separate queue param)
- Added secret-based authentication to all runner management methods
- Created comprehensive osiris_openrpc example
- Archived old examples to _archive/
- Updated client API to match simplified supervisor interface

examples/osiris_openrpc/access_denied.rhai

@@ -0,0 +1,8 @@
+print("Attempting to access context with non-signatories...");
+print("Participants: [dave, eve]");
+print("Signatories: [alice, bob, charlie]");
+
+// This should fail because neither dave nor eve are signatories
+let ctx = get_context(["dave", "eve"]);
+
+"This should not succeed!"