Add script to bootstrap SQLite & Mongo from files

[RoseAllenM]

Summary

This PR adds a bootstrap_dataset script to pre-populate custom playlists/transcripts into SQLite and Mongo. This makes it possible to to test DNA functionality without needing to host a fake review session first.

Testing

• I have tested these changes locally
• I have run all relevant automated tests
• I have verified this does not break existing workflows

How I Tested

• make start-mongo
• python -m dna.devtools.bootstrap_dataset ../sample_dailies_dataset
• make start-local

[jspada200]

Looks good to me! I think we do need to wait for @DmitriyG228 's PRs related to transcription to land then update this as the data model for transcripts is changing.

[jspada200]

Hey! @DmitriyG228 's change is in. Feel free to adapt then will take another look

[jspada200]

Hey @RoseAllenM , could you check to make sure the data shape for transcription is up to date and the tests pass? Thanks!