Add category header and updates from Living Copy (#1084)

* 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

client/src/components/DatasetCard/tests/__snapshots__/datasetCard.test.tsx.snap

@@ -10,9 +10,9 @@ exports[`rendering of indicator dataset card checks if component renders 1`] = `
     </h3>
     <div>
       
-    Percent of a block group's population in households where household income is at or below
-    200% of the federal poverty level.
-    
+        Percent of a census tract's population in households where household income is at or below
+        200% of the federal poverty level.
+      
     </div>
     <ul>
       <li>
@@ -24,7 +24,7 @@ exports[`rendering of indicator dataset card checks if component renders 1`] = `
           rel="noreferrer"
           target="_blank"
         >
-          Census's American Community Survey.
+          Census's American Community Survey
         </a>
       </li>
       <li>