Refactor content types and forms.
Update example content profile, add initial committee container.
Add new submit transition submit actions with new plone content type.
Add submitted proposal type.
Consolidate form views, only one file per type.
Update transporter docstrings.
Rewrite, use views instead of plone.api to create "remote" content.
Add context manager to temproraily change security context.
Update gitignore.
Drop unused/deprecated IClientCommunicator.
Move transporter from `ogds.base` to `base`.
Move remote_request from ogds.base to base and rename to dispatch_request.
Don't show committee-container when meeting-feature is not enabled.
Refactor, add filtered menu base class for all post factory menus.