Federate certain AU materials onto country LIIs (eg. EAC and TanzLII)

[longhotsummer]

For example, TanzLII requires:

• African Court - https://africanlii.org/judgments/AfCHPR/
• African Commission - https://africanlii.org/au/au-organs/ACHPR/ (author)
• AU charters and treaties relating to Tanzania
• EACJ - https://africanlii.org/judgments/EACJ/
• EAC treaties and directives - https://africanlii.org/au/rec/aa-eac/ (locality, mixed document types)

And GhaLII requires:

• African Court - https://africanlii.org/judgments/AfCHPR/
• African Commission - https://africanlii.org/au/au-organs/ACHPR/ (author)
• ECOWAS CJ - https://africanlii.org/judgments/ECOWASCJ/
• ECOWAS charters and treaties - https://africanlii.org/au/rec/aa-ecowas/ (locality, mixed document types)
• AU charters and treaties

[longhotsummer]

Proposal

Frontend / UX

A new "African Union and EAC" menu item is added to the LII. It is a dropdown with:

• African Court - a link to judgments from that court
• African Commission on Human and Peoples Rights - a link to the judgments from that court
• East African Community (EAC) - a link to listing documents in the aa-eac locality
• East African Court of Justice - a link to judgments from that court
• East African Community (EAC) Legislation - a link to the locality legislation listing page for the EAC
• AU Charters and Treaties - a link to legislation from the AU (with ratification details)

The above documents all naturally show up in search, too.

• the judgments page is updated to include the AfCHPR and the EACJ (should happen automatically)
• the legislation listing page has EAC and AU as a localities
• the gazettes listing page has EAC as a locality

Equivalent changes are made for ECOWAS.

Backend

Ingestors

An ingestor and adapter is created for each document type (or collection?):

• Judgment (already done)
• Gazette
• Legislation

The ingestors are configured to poll AfricanLII for the latest content.

Note that generic documents are NOT ingested.