Add tool to re-attempt failed bulk index payloads

### Problem Description

When crawler fails all retry attempts when bulk indexing a payload into Elasticsearch, it will save the payload as a file to the directory `output/failed_payloads//`. This file's existence is logged to the user but no instructions are provided on what to do with it, and no tools exist currently to easily re-index this data.

### Proposed Solution

Two things should be added to address this

- [ ] The file's payload is already perfect for a bulk index operation. The CLI should have a "re-attempt indexing of failed payloads" command that will attempt to index these files.
- [ ] Documentation should be added explaining what to do with these files.

### Alternatives

Some documentation on how to do this manually might be enough, but it would require users to use Elasticsearch API in the shell which might be a barrier for some.