Create a new mainframe file or directory

Creates a new mainframe file or directory in the specified pipeline with the provided content and application type.

Process Overview:

1. Request Validation - Validates directory path, file/folder name, content, and application type
2. File or Directory Creation - Creates the file with specified content, or creates a directory if directory=true

Directory Creation:

• Request directory creation by setting directory=true in the request body. When creating a directory, fileContent must be null.
• Provide the directory structure in the path field (e.g. '/path/to') and the folder name in the name field.
• Use "/" for root directory path.

File Creation:

• Provide the directory path in the path field and the filename (with extension) in the name field.
• Upload the file content via the multipart fileContent field.

File Application Types:

• ENGINE_SCRIPT - Script files for execution engine
• CONFIGURATION - Configuration files

Required Permissions: replication-pipeline::create when permission harmonization is enabled; otherwise, replication-pipeline::manage.