This is a breakdown of EPIC #2708

• Include an overview of the assemblies section.
• Show a full list of assemblies, filterable by type of assembly (sectoral, city, district, neighbourhood, others) with the filter and browser available for other components such as Proposals or Meetings.
• Show an organisational chart of assemblies with their relationships (e.g. the working groups of an assembly).
• Show the calendar of meetings for all assemblies.
• Show the map of meetings for all assemblies.