docs(spelling): Add codespell config + github action, run and fix a good number of typos (#3645)

platform/ui/src/components/TableCell/TableCell.tsx

@@ -6,7 +6,7 @@ const TableCell = ({
   children,
   className,
   colSpan,
-  // ignored because we don't wan't to expose this prop
+  // ignored because we don't want to expose this prop
   // eslint-disable-next-line react/prop-types
   cellsNum,
   isTableHead,

platform/ui/src/contextProviders/DialogProvider.tsx

@@ -7,7 +7,7 @@ import classNames from 'classnames';
 /*
  * This is a workaround to import things from ohif/core as docz does
  * not allow us to access window element and @ohif/core does use it once
- * we import to instanciate cornerstone
+ * we import to instantiate cornerstone
  */
 import guid from './../../../core/src/utils/guid';