TS migration. #2288. (#2328)

* Added TS. Updated build and linting config. Added types.

* [ts-migrate][.] Rename files from JS/JSX to TS/TSX

Co-authored-by: ts-migrate <>

* [ts-migrate][.] Run TS Migrate

Co-authored-by: ts-migrate <>

* Corrected files mangled by ts-migrate.

* Updated lint config, minor linting.

* Re-enabled Husky.

* Updated tests and config.

* Reverted webpack devtool config.

* Removed obsolete snapshots.

* Added annotations snap.

* Updated tsconfig includes wrt linting.

* Removed ts-migrate.

Co-authored-by: Timmy Huang <tihuan@users.noreply.github.com>

client/src/components/rightSidebar/index.tsx

@@ -3,9 +3,10 @@ import { connect } from "react-redux";
 import GeneExpression from "../geneExpression";
 import * as globals from "../../globals";
 
+// @ts-expect-error ts-migrate(1238) FIXME: Unable to resolve signature of class decorator whe... Remove this comment to see the full error message
 @connect((state) => ({
-  scatterplotXXaccessor: state.controls.scatterplotXXaccessor,
-  scatterplotYYaccessor: state.controls.scatterplotYYaccessor,
+  scatterplotXXaccessor: (state as any).controls.scatterplotXXaccessor,
+  scatterplotYYaccessor: (state as any).controls.scatterplotYYaccessor,
 }))
 class RightSidebar extends React.Component {
   render() {