Frontend adapts to metadata (in preparation for Pv5)

[Chiyun-Lee]

Remove all hardcoding of facts relating to Pf7/Pf8 and instead make the frontend read a metadata file found in the datapack which populates various fields and UI elements across the app with the appropriate species or data release to minimise bespoke development.

In other words, make the app read that the datapack in that specific instance relates to Pv5, despite having the same frontend code, therefore presenting itself as the Pv5 version