docs(db): clarify docs/conventions of table/collection names

Author: balazsorban44

docs/docs/guides/adapters/creating-a-database-adapter.mdx

@@ -147,6 +147,7 @@ If you created an adapter and want us to distribute it as an official package, p
    - Configured as an ES module (ESM)
    - Documented via JSDoc comments
    - Have at least one named export exported from its main module. (For example `export function MyAdapter(): Adapter {}`)
+   - collection/table names should follow the convention (plural/singular, camelCase/snake_case) of the underlying ORM/database docs/conventions
 
 1. Configure the monorepo to help us maintain the package