This _almost_ completed the feature as intended. In fact, it went
further in one way in that it's already storing the tags in a field
that is separate from the state string. But it's falling short in that
the edit interface is not currently showing the tags at all.
Ordered punch-list (aiming to complete by 2021-01-08)
-----------------------------------------------------
-• Add /tag to add/remove tags (will force to all caps and store as a
- prefix as part of the state string for now)
-
- Specifically, this should be "/tag TAG_NAME" or "/tag +TAG_NAME" to
- add a tag and "/tag -TAG_NAME" to remove a tag.
+• Add tags to the puzzle edit interface
• Make the /hunt command drop from the database any rounds that have 0
puzzles in them