UX: Update Planner pages with user-friendly text

- Keywords page: Changed 'Keywords' to 'Your Keywords'
- Clusters page: Changed 'Keyword Clusters' to 'Topic Clusters'
- Shared columns: Changed 'Volume' to 'Search Volume'
- Shared columns: Changed 'Cluster' to 'Topic Group'
- Shared columns: Changed 'Sector' to 'Category'

frontend/src/config/snippets/columns.snippets.ts

@@ -27,7 +27,7 @@ export const statusColumn = {
 
 export const volumeColumn = {
   key: 'volume',
-  label: 'Volume',
+  label: 'Search Volume',
   sortable: true,
   numeric: true,
   width: '100px',
@@ -51,7 +51,7 @@ export const countryColumn = {
 
 export const clusterColumn = {
   key: 'cluster',
-  label: 'Cluster',
+  label: 'Topic Group',
   sortable: true,
   width: '200px',
 };
@@ -90,7 +90,7 @@ export const wordCountColumn = {
 
 export const sectorColumn = {
   key: 'sector_name',
-  label: 'Sector',
+  label: 'Category',
   sortable: false,
   width: '150px',
 };