Implement downloads page and May 25th timed copy changes (#1653)

* Add initial side nav

* Add Download page as a sub-page under Meth&Data

- udpate S3 file path in .envs
- remove the DownloadPacket component
- move download copy from methodology to download
- modify header to use two types of navs:
--  mobile (with sub-pages) and
-- desktop (without subpages)
- create a SubPageNav component
- add SubPagNav to Meth and Download page
- update snapshots
- add global CSS overide to remove minus sign on mobile nav link accordion as it's permanently open

* Remove the update tag above Public eng button

* Make the 3rd bullet on explore page update on 5/25

* Make the RFI box text change after 5/25/22

* Update site with RFI expired copy, remove Alerts

- add Spanish translations
- update snapshots

* Fix typo on XLS file path

* Refactor HowYouCanHelp to standard form

* Add custom download links with icons

- add new DownloadLink compnent
- add Spanish translations

* Update download file sizes

* Allow meth&data nav link to collapse on mobile

client/src/pages/methodology.tsx

@@ -4,12 +4,14 @@ import {useIntl} from 'gatsby-plugin-intl';
 
 import Categories from '../components/Categories';
 import DatasetContainer from '../components/DatasetContainer';
-import DownloadPacket from '../components/DownloadPacket';
 import J40MainGridContainer from '../components/J40MainGridContainer';
 import MethodologyFormula from '../components/MethodologyFormula';
 import Layout from '../components/layout';
 import PublicEngageButton from '../components/PublicEngageButton';
+import SubPageNav from '../components/SubPageNav';
+import {useWindowSize} from 'react-use';
 
+import * as CONSTANTS from '../data/constants';
 import * as METHODOLOGY_COPY from '../data/copy/methodology';
 
 interface MethodPageProps {
@@ -18,6 +20,7 @@ interface MethodPageProps {
 
 const IndexPage = ({location}: MethodPageProps) => {
   const intl = useIntl();
+  const {width} = useWindowSize();
 
   return (
     <Layout location={location} title={intl.formatMessage(METHODOLOGY_COPY.PAGE.TILE)}>
@@ -51,9 +54,15 @@ const IndexPage = ({location}: MethodPageProps) => {
           </Grid>
 
           {/* Second column */}
-          <Grid col={12} tablet={{col: 4}}>
-            <DownloadPacket />
+          <Grid col={12} tablet={{col: 1}}>
+            {/* Spacer column */}
           </Grid>
+
+          {/* Third column */}
+          {width > CONSTANTS.USWDS_BREAKPOINTS.DESKTOP ?
+          <Grid col={12} tablet={{col: 3}}>
+            <SubPageNav activeSubPageIndex={1}/>
+          </Grid> : ''}
         </Grid>
       </J40MainGridContainer>