fix: validation should validate exactly what one would expect

• typing
• BaseQLSelectionSet support for custom scalars
• exclude resolved fields from committing when saving (dirty will stay true if those contain open changes). This is considered a fix, not a breaking change since one should not have relied on this anyways and we're not aware of cases where we have relied on it
• validateFields getter on AdornisEntity behaves like expected, logic moved from hacked logic in AdornisEntity.validate
• validateFields is now a function that accepts additionalMeta as passed through the validator
• validator will now fire a single error even if in multiple error collection if there is only one error in the list (minor UX improvement)