Add storybook for repository filter component

Author: robertbrignull

extensions/ql-vscode/src/stories/variant-analysis/RepositoriesFilter.stories.tsx

@@ -0,0 +1,25 @@
+import * as React from "react";
+import { useState } from "react";
+
+import { ComponentMeta } from "@storybook/react";
+
+import { RepositoriesFilter as RepositoriesFilterComponent } from "../../view/variant-analysis/RepositoriesFilter";
+import { FilterKey } from "../../pure/variant-analysis-filter-sort";
+
+export default {
+  title: "Variant Analysis/Repositories Filter",
+  component: RepositoriesFilterComponent,
+  argTypes: {
+    value: {
+      control: {
+        disable: true,
+      },
+    },
+  },
+} as ComponentMeta<typeof RepositoriesFilterComponent>;
+
+export const RepositoriesFilter = () => {
+  const [value, setValue] = useState(FilterKey.All);
+
+  return <RepositoriesFilterComponent value={value} onChange={setValue} />;
+};