Attributes: enums with additional metadata

[martastain]

This pull request introduces several changes to enhance attribute handling, improve error logging, and update project setup processes. The most important changes include adding a new property to fetch project defaults, updating logging methods, and modifying attribute handling in various modules.

Attribute Handling Enhancements:

• Added a new project_defaults property in ayon_server/entities/core/attrib.py to fetch default attribute values for projects.
• Updated parse_attrib_data and rebuild_inherited_attributes to utilize the new project_defaults property. (ayon_server/graphql/utils.py: [1] ayon_server/helpers/inherited_attributes.py: [2]
• Added icon and color fields to the AttributeEnumItem class in ayon_server/types.py to support additional attribute metadata.

Logging Improvements:

• Replaced logging.error with log_traceback for better error traceability in generate_model function in ayon_server/entities/models/generator.py. [1] [2]

Project Setup Updates:

• Included a call to rebuild_inherited_attributes for each project in the setup process to ensure attributes are correctly initialized in setup/__main__.py.
• Added a new attribute priority with enum values and associated metadata in setup/attributes.py.

These changes collectively aim to improve the robustness and maintainability of the attribute handling system and enhance the setup process for new projects.Adds icon and color to AttributeEnumItem model.

[martastain]

@Innders Are we adding that priority built-in attribute?

[martastain]

@Innders i've changed the way defaults propagate to the children entities, so it should now display correctly the default priority set in anatomy or set as default on the attribute. In order to rebuild the hierarchy on the project created before this attribute was introduced, it is necessary to run the setup process (make setup). that will be triggered during server update, so it shouldn't cause issues.