* [feat] add nodes for z-image
* updates for fp4 state dict loading
* unit test case for z-image-turbo text-to-image workflow
* update documentation templates for z-image
* minor fix: remove some warnings and invalid attribute access during model loading
* drop down res4lyf test case
* style: make linter happy
* modify test case metrics
* add notes for maintenance
* add github url in notes
* simplify the notes