feat: repositoryCache (#6589)

docs/usage/self-hosted-configuration.md

lib/config/common.ts

lib/config/definitions.ts

lib/util/cache/repository/index.spec.ts

lib/util/cache/repository/index.ts

lib/workers/repository/finalise/index.ts

lib/workers/repository/init/config.ts

lib/workers/repository/init/index.ts

...ository/process/__snapshots__/extract-update.spec.ts.snap

lib/workers/repository/process/extract-update.spec.ts

lib/workers/repository/process/extract-update.ts

package.json

yarn.lock