ESLint tooling and enforcement(#1492)

* add eslint-prettier

* add lint-staged

* ignore .eslintcache

* remove unused import

* attempt test change

* Revert "attempt test change"

This reverts commit 78d0e31d41.

* attempt to add error

* Revert "attempt to add error"

This reverts commit a5885c0942.

* add error

* create config

* add comment

* tweak glob

* Revert "add error"

This reverts commit 3187522396.

* add python error

* Revert "add python error"

This reverts commit d0b116ed15.

* lint on push + PR

* Revert "add comment"

This reverts commit efa4eb6676.

* add prettier rules to ESLint

* remove lint-diff targets

client/src/components/categorical/category/index.js

@@ -2,13 +2,7 @@ import React from "react";
 import _ from "lodash";
 import { connect } from "react-redux";
 import { FaChevronRight, FaChevronDown } from "react-icons/fa";
-import {
-  AnchorButton,
-  Button,
-  Tooltip,
-  Icon,
-  Position,
-} from "@blueprintjs/core";
+import { AnchorButton, Button, Tooltip, Position } from "@blueprintjs/core";
 import CategoryFlipperLayout from "./categoryFlipperLayout";
 import AnnoMenu from "./annoMenuCategory";
 import AnnoDialogEditCategoryName from "./annoDialogEditCategoryName";