Add title and description fields to markdown files

docs/ensembl-help/using-ensembl/viewing-ensembl-data/entity-viewer/looking-at-genes-and-transcripts.md

 ---
 slug: looking-at-genes-and-transcripts
-parent: viewing-ensembl-data
+title: Looking at genes and transcripts
+description: Overview of Ensembl genome browser
 tags:
-  - genes, transcripts
+  - genes
+  - transcripts
 status: draft
 ---
 

docs/ensembl-help/using-ensembl/viewing-ensembl-data/entity-viewer/using-the-entity-viewer.md

 ---
 slug: using-the-entity-viewer
-parent: viewing-ensembl-data
+title: Using the Entity Viewer
+description: Overview of Ensembl entity viewer
 tags:
-  - genes, transcripts
+  - genes
+  - transcripts
 status: draft
 ---
 

docs/ensembl-help/using-ensembl/viewing-ensembl-data/genome-browser/action-buttons.md

 ---
 slug: action-buttons
+title: Action buttons
+description: Managing tracks and personal data in genome browser
 parent: viewing-ensembl-data
 tags:
   - browser

docs/ensembl-help/using-ensembl/viewing-ensembl-data/genome-browser/track-configuration.md

 ---
 slug: track-configuration
-parent: viewing-ensembl-data
+title: Track configuration
+description: How to configure individual tracks in Ensembl genome browser
 tags:
   - browser
 status: draft

docs/ensembl-help/using-ensembl/viewing-ensembl-data/genome-browser/using-the-genome-browser.md

 ---
 slug: using-the-genome-browser
-parent: viewing-ensembl-data
+title: Using the genome browser
+description: How to browse genes, variants, and other features aligned to the reference genome
 tags:
   - browser
 status: draft