feat: add link to search episode transcripts in members page

- Add a "Search Episode Transcripts (Beta)" link to the members page.
- Reuse the same URL and icon classes as the "Search Episodes (Beta)" link.

content/members/index.hbs

@@ -11,6 +11,9 @@ links:
   - name: Search Episodes (Beta)
     url: /episodes/search
     iconClasses: bi bi-binoculars
+  - name: Search Episode Transcripts (Beta)
+    url: /episodes/search
+    iconClasses: bi bi-binoculars
   - name: GM Tools
     url: gm-tools
     iconClasses: bi bi-journal-bookmark