[BUG] The path to generated files is passed to the postprocessor without proper escaping/quoting

Description

When using the openapi-generator-cli npm package with the typescript-angular generator and command line argument --enable-post-process-file, the path of each generated file is passed to the postprocess script without escaping or quoting. This results in incorrect arguments if the path where the generated files are saved contains e.g. a space, so that the postprocess script fails.

openapi-generator version

openapi-generator-cli 2.4.13
openapi-generator 4.3.1

Steps to reproduce

1. download any openapi schema and save it as schema.json
2. create a directory called test directory (note the space)
3. create a file called 'test.sh' with the following contents:

#!/bin/bash
for arg in "$@"; do
        echo "$arg" >> postprocess.log
done

make this file exectuable
4. Run the command TS_POST_PROCESS_FILE="./test.sh" openapi-generator-cli generate --enable-post-process-file -i schema.json -o '"test directory"' -g typescript-angular
5. Check the output in the file postprocess.log.

Suggest a fix

Pass the path of the generated files to the postprocess script either quoted or escaped such that a path is not improperly split.

Reproduce the issue with schema.json, the test.sh postprocess script, and an output directory named test directory using the provided openapi-generator-cli command. Trace where generated file paths are passed to the postprocess script; done means the path is received as one argument, which can be verified in postprocess.log.