Cleans up various Payload-generated configs, namely:
- Renames config entry files from `preferencesCollection.ts`,
`lockedDocumentsCollection.ts`, and `jobsCollection.ts` to `config.ts`
- Standardizes collection slugs for `payload-preferences`,
`payload-locked-documents`, and `payload-jobs` and reuses everywhere
- Renames camel-cased `payloadPreferences` directory to kebab case, i.e.
`payload-preferences`
8f203bbbe1