Add the feature "process type" to allow filtering Processes by type

PROBLEM:
In some cases it is required to be able to filter participatory processes by type and subtype. The "processes" module allows creating groups of processes, but does not have a filter field available (as if it exists instead in the "assemblies" module).

SOLUTION:

Add a field and a filter functionality "type of processes" to allow filtering processes by type, as we can do in "assemblies".

ALTERNATIVES:

It is not convenient to use the available global classification systems ("scopes" and "areas") because they don't allow a differentiated application according to the context (show different filters in /processes or in /assemblies or even in /group_process, for example). And they are systems that are too intertwined with many other modules & components.

ADDITIONAL CONTEXT:

In order to create the new process_type feature, we will...

-Create a Decidim::ParticipatoryProcessType model and an optional association with participatory processes.

-Add CRUD management from admin of process types and include the association in the processes form.

-Add a filter to set process_type in the global processes list or current processes group ( /processes & /processes_groups/X ), like the existing assembly_type selector.

With some extra enhancements:

• This filter should not appear if there are no processes with a type assigned.
• The filter should only display the different types of available processes in the context (global processes list or current processes group)

-Make sure to add tests to keep test coverage at required levels.

Could this issue impact on users private data?

NO.

FUNDED BY:
Government of Navarra / Nafarroako Gobernua