Release version 0.1

Release version 0.1

Features:

• File Renaming: Automatically shifts each alphabetical character in a given file name by one letter to the left.
• Multiprocessing: Multiprocessing to speed up renaming all files in a directory.
• Error Handling: Logging actions in JSON format and error messages.
• Environment Configurable: Configurable logging verbosity and log file name through environment variables.