Add an RSS ingest provider

Add an RSS ingest provider: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Superdesk can ingest content from a number of external sources (Reuters, AFP, FTP, …). Each source type is implemented as an ingest provider that the rest of the system can look up by a…

The task

Superdesk can ingest content from a number of external sources (Reuters, AFP, FTP, …). Each source type is implemented as an ingest provider that the rest of the system can look up by a short type name and ask to fetch new content.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.