This PR updates function signatures, docstrings, and gpui's other documentation to reflect it's new state following the merge of `Model` and `View` into `Entity` as well as the removal of `WindowContext`. Release Notes: - N/A
This PR updates function signatures, docstrings, and gpui's other documentation to reflect it's new state following the merge of `Model` and `View` into `Entity` as well as the removal of `WindowContext`. Release Notes: - N/A