[Feature Request]: srv_g_decorate and decorators

### Feature description

This package has its own way to decorate plots with modules like `srv_g_decorate()` and `ui_g_decorate()`. They are custom modules not really decorators as they are inserted as part of the modules on the package.

Now that a general solution exists and it is implemented on #338, it would be great if the decorator is improved (see #46) and exported, or if it is removed and left for the user to specifiy it with decorators elsewhere (uteals?)

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct.

### Contribution Guidelines

- [x] I agree to follow this project's Contribution Guidelines.

### Security Policy

- [x] I agree to follow this project's Security Policy.

Start by reviewing the decorator approach in #338 and the requested improvements in #46, then inspect srv_g_decorate() and ui_g_decorate() in the package. Determine whether the general decorator should be improved and exported or whether these custom modules should be removed so users specify decorators elsewhere; done requires a decided direction and corresponding package behavior.

Written by the indexing model from the issue text.