[Docs] Getting Started - Error Management

We need a huge section for this since it is by far our hugest problem for new users.

Here are cases we need to make sure we cover:
1. Fail task and stop stream when an error occurs
- This should be the default behavior
2. Fail task after stream finished when an error occurs
- testing or linting
3. Log when an error occurs but stop nothing
- for people who like partial builds