Add methodology, living copy updates, fixes markdown checker failures (#1104)

* Add category header (Indicator and Percentile)

- add local styling
- override accordion-content styles to push into parent container
- intl copy
- update snapshots

* Add latest Living Copy

- refactor dataset cards to allow for any styling in description, used in and responsible party
- add percent for HS edu indicator
- updates snapshots

* Update copy from Living Copy doc

-update snapshots

* Add methodology to copy

* Remove link from readme file based on md checker

* Comment out certain markdown links from checker

* Comment out markdown links that render in browser

* Add missing methodology to Clean Water

client/src/components/DatasetContainer/tests/__snapshots__/datasetContainer.test.tsx.snap

@@ -644,7 +644,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
                   <span>
                     Used in: 
                   </span>
-                  Critical clean water and waste infrastructure
+                  Critical clean water and waste infrastructure methodology
                 </li>
               </ul>
             </div>

client/src/data/copy/methodology.tsx

@@ -373,7 +373,7 @@ export const CATEGORIES = {
   CLEAN_WATER: {
     METHODOLOGY: <FormattedMessage
       id= {'indicator.categories.clean.water.methodology'}
-      defaultMessage= {`Critical clean water and waste infrastructure`}
+      defaultMessage= {`Critical clean water and waste infrastructure methodology`}
       description= {`Critical clean water and waste infrastructure methodology`}
     />,
     TITLE: <FormattedMessage

client/src/pages/__snapshots__/methodology.test.tsx.snap

@@ -1440,7 +1440,7 @@ exports[`rendering of the DatasetContainer checks if various text fields are vis
                     <span>
                       Used in: 
                     </span>
-                    Critical clean water and waste infrastructure
+                    Critical clean water and waste infrastructure methodology
                   </li>
                 </ul>
               </div>