feat: environment and stage addons

[leonsteinhaeuser]

Description

This pull request introduces environment and stage-based addons and improves the validation for defined addon property types. These enhancements aim to provide better flexibility and robustness in managing addons.

Changes

environment and stage based addons:

• Added support for defining addons based on different environments (e.g., development, staging, production).
• Implemented logic to load and apply addons specific to the current environment and stage.

Improved validation for defined addon property types:

• Enhanced validation mechanisms to ensure that addon properties conform to the expected types.
• Added comprehensive error messages to guide users in correcting invalid property definitions.