This PR moves the entire project to Typescript. Due to the ~1000 ignores this will lead to a messy codebase for a while, but the churn is worth it – all of those ignore comments are places that were never type-safe previously.
closes#1282
* perf: Remove no-longer-used 'backup' columns
These were added as part of the move to the v2 editor over a year ago incase any text was not correctly converted. After a year of use no cases of failed conversion have occurred that required the use of this column
* Remove migration, will do in 2-step release
* perf: Remove no-longer-used 'backup' columns
These were added as part of the move to the v2 editor over a year ago incase any text was not correctly converted. After a year of use no cases of failed conversion have occurred that required the use of this column
