Refactor runner and installation scripts for improved functionality

- Removed the `--disable-hiprt` flag from the runner command, simplifying the rendering options for users.
- Updated the `jiggablend-runner` script and README to reflect the removal of the HIPRT control flag, enhancing clarity in usage instructions.
- Enhanced the installation script to provide clearer examples for running the jiggablend manager and runner, improving user experience during setup.
- Implemented a more robust GPU backend detection mechanism, allowing for better compatibility with various hardware configurations.

pkg/executils/exec.go

@@ -361,6 +361,9 @@ func RunCommandWithStreaming(
 				}
 			}
 		}
+		if err := scanner.Err(); err != nil && !isBenignPipeReadError(err) {
+			logSender(taskID, types.LogLevelWarn, fmt.Sprintf("stdout read error: %v", err), stepName)
+		}
 	}()
 
 	go func() {
@@ -375,6 +378,9 @@ func RunCommandWithStreaming(
 				}
 			}
 		}
+		if err := scanner.Err(); err != nil && !isBenignPipeReadError(err) {
+			logSender(taskID, types.LogLevelWarn, fmt.Sprintf("stderr read error: %v", err), stepName)
+		}
 	}()
 
 	err = cmd.Wait()