* Extend `ace-builds.d.ts`

* Partially migrate to TypeScript

Define component props and state types, add straightforward types

* Add editor ref null checks

* Add null checks for optional fn props

* Fix missing types (simple)

* Add straightforward ace editor null checks

* Cast editor type on load

* Fix `cardTagIdAtCursor` method

* Fix `handleCursorChange` method

* Fix missing arguments for ace's `setScrollMargin`

* Use `Question` methods over properties

* Use ace's completer types

* Add editor null checks

* Fix `setTableId` method

* Fix `_updateSize` method

* Fix `getCardTagCompletions` method

* Fix `getSnippetCompletions` method

* Fix autocompletion types

* Fix scroll margin

* Fix `fetchQuestion` type

* Fix resizable box

* Remove redundant editor null check

* Fix incorrect type

* Break down `OwnProps`

* Fix `_lastAutoComplete` type

* Minor fix

* Minor fix

* Avoid ace editor type casting

* Add radix to `parseInt`