Create `readme` crawler

[Jabolol]

• fetch repos from oso graphql API
• use rest factory to grab root level readme.md files (via resource relatiosnhip)
• config to provide minTrustRank maxTrustRank

Query;

SELECT DISTINCT url FROM int_ddp_repo_discovery_v0
WHERE trust_rank BETWEEN 1 and 100

[linear[bot]]

OSO-1298

[Jabolol]

We didn't manage to get it in time. Not urgent anymore, deprioritizing.