docs/faq: add back index + frontmatter tweaks

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

docs/faq/index.md

@@ -0,0 +1,15 @@
+---
+id: index
+title: Overview
+description: FAQ Overview
+---
+
+This section contains answers to frequently asked questions about Backstage.
+
+### [Product FAQ](../faq/product.md)
+
+Questions related to product and design.
+
+### [Technical FAQ](../faq/technical.md)
+
+General technical questions about Backstage.

docs/faq/product.md

@@ -1,7 +1,7 @@
 ---
-id: Product FAQs
-title: Product FAQs
-description: All FAQs related to Product
+id: product
+title: Product FAQ
+description: Product FAQ
 ---
 
 ### Can we call Backstage something different? So that it fits our company better?

docs/faq/technical.md

@@ -1,7 +1,7 @@
 ---
-id: Technical FAQs
-title: Technical FAQs
-description: All FAQs related to Technical
+id: technical
+title: Technical FAQ
+description: Technical FAQ
 ---
 
 ### What technology does Backstage use?