Disaster Type Definitions & Picker

[sunnymui]

1. Define disaster types - We need to define every disaster type a post can be tagged as. This structured data will make data input less error prone on entry and enables other functionality like sort/filter/categorize by type. Disaster types can also be pretranslated for multilingual accessibility.

2. Add disaster type picker & relevant logic to add the data field to the db - Need to add the form input on the admin UI for the disaster type picker. Also need to add any relevant logic to add/update related fields in the db.