Added pos -> position aliases
Added pos -> position aliases

ImGui always shortens "position" to "pos", but we have both `get_window_position` and `get_cursor_pos`. It would be nice to settle on one and use it consistently. In the meantime, I added aliases from `*_pos` to `*_position`.

swistakm/pyimgui,swistakm/pyimgui,swistakm/pyimgui,swistakm/pyimgui