Improve documentation for modules, especially economy utils

[takaro-ci-bot]

Description

Improve the documentation for modules, with a particular focus on the economy utils module. Users have reported that the current documentation is lacking in detail and clarity, making it difficult for them to fully understand and utilize the features available.

Requirements/use-cases

• Users should be able to easily understand how to set up and configure the economy utils module
• Documentation should clearly explain all available features and commands within the economy utils module
• Include examples of common use cases and configurations
• Provide clear explanations of concepts like zombie kill rewards, currency transfer, and shop functionality

Possible duplicates:

• Implement a system for community members to create modules #1386