Add big fig.yml to run everything

`fig up` to run the entire development environment!

This means we can connect stuff up in development instead of using production data.

Ref: https://github.com/LandRegistry/concept-titles-service/pull/8 https://github.com/LandRegistry/concept-system-of-record/pull/4 https://github.com/LandRegistry/concept-update-register/pull/3 https://github.com/LandRegistry/concept-my-property/pull/15