Support custom dir to --init

[Chemaclass]

📚 Description

Replace this text with a short description of your feature/bugfix.

🔖 Changes

• Added support for passing a directory to the init command by allowing an optional argument in the initialization script
• Updated the main script to forward an optional directory when invoking the init function
• Documented the new optional argument in the command-line guide with an updated example
• Extended the acceptance tests to cover initialization in a custom directory

✅ To-do list

• I updated the CHANGELOG.md to reflect the new feature or fix
• I updated the documentation to reflect the changes

🖼️ Demo