feat(Sorting): Refining sorting vs filtering guidelines

This MR intends to start a discussion for adding more details to our Sorting v.s Filtering guideline. We are having some inconsistencies across the app for sorting and filtering, one example:

• The project page. Filtering and Sorting are in the same dropdown.
• In (ToDos) Sorting is used on the right side of the layout, filtering on the left . Both filtering and sorting are on the right on the issue comment section (show issue history v.s comment vs all)

Adding more details to this part of the documentation could facilitate decision making during the design process, prevent UX debt and improve the overall consistency of the components usage.