Adds chime quickstart items and basic empty mission page behind featu…

…re flag (#2702)

app/components/NoticeTypeCheckboxes/NoticeTypeCheckboxes.tsx

@@ -244,6 +244,11 @@ export function NoticeTypeCheckboxes({
     JsonNoticeTypeLinks['Super Kamiokande'] = '/missions/sksn'
   }
 
+  if (useFeature('CHIME')) {
+    JsonNoticeTypes.Chime = ['gcn.notices.chime.alert']
+    JsonNoticeTypeLinks.Chime = '/missions/chime'
+  }
+
   const counterfunction = (childRef: HTMLInputElement) => {
     if (childRef.checked) {
       userSelected.add(childRef.name)

app/routes/missions.chime/route.mdx

@@ -0,0 +1,13 @@
+---
+handle:
+  breadcrumb: Chime
+---
+
+import { feature } from '~/lib/env.server'
+
+export async function loader() {
+  if (!feature('CHIME')) throw new Response(null, { status: 404 })
+  return null
+}
+
+# Chime

app/routes/missions.tsx

@@ -9,6 +9,7 @@ import { NavLink, Outlet } from '@remix-run/react'
 import { GridContainer } from '@trussworks/react-uswds'
 
 import { SideNav } from '~/components/SideNav'
+import { useFeature } from '~/root'
 import type { BreadcrumbHandle } from '~/root/Title'
 
 export const handle: BreadcrumbHandle = { breadcrumb: 'Missions' }
@@ -32,6 +33,11 @@ export default function () {
               <NavLink key="calet" to="calet">
                 CALET
               </NavLink>,
+              useFeature('CHIME') && (
+                <NavLink key="chime" to="chime">
+                  Chime
+                </NavLink>
+              ),
               <NavLink key="einstein-probe" to="einstein-probe">
                 Einstein Probe
               </NavLink>,