microsite-next: redirects for new index pages + fix links

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

docs/FAQ.md

@@ -176,7 +176,7 @@ By far, our most-used plugin is our TechDocs plugin, which we use for creating
 technical documentation. Our philosophy at Spotify is to treat "docs like code",
 where you write documentation using the same workflow as you write your code.
 This makes it easier to create, find, and update documentation.
-[TechDocs is now open source.](https://backstage.io/docs/features/techdocs/techdocs-overview)
+[TechDocs is now open source.](https://backstage.io/docs/features/techdocs/)
 (See also:
 "[Will Spotify's internal plugins be open sourced, too?](#will-spotifys-internal-plugins-be-open-sourced-too)"
 above)

docs/features/techdocs/cli.md

@@ -8,7 +8,7 @@ description: TechDocs CLI - a utility command line interface for managing TechDo
 Utility command line interface for managing TechDocs sites in
 [Backstage](https://github.com/backstage/backstage).
 
-https://backstage.io/docs/features/techdocs/techdocs-overview
+https://backstage.io/docs/features/techdocs/
 
 ## Features
 

docs/features/techdocs/how-to-guides.md

@@ -433,7 +433,7 @@ const app = createApp({
 
 ## How to add the documentation setup to your software templates
 
-[Software Templates](https://backstage.io/docs/features/software-templates/software-templates-index)
+[Software Templates](https://backstage.io/docs/features/software-templates/)
 in Backstage is a tool that can help your users to create new components out of
 already configured templates. It comes with a set of default templates to use,
 but you can also

docs/getting-started/create-an-app.md

@@ -71,9 +71,9 @@ app
   good starting point for you to get to know Backstage.
 - **packages/backend/**: We include a backend that helps power features such as
   [Authentication](https://backstage.io/docs/auth/),
-  [Software Catalog](https://backstage.io/docs/features/software-catalog/software-catalog-overview),
-  [Software Templates](https://backstage.io/docs/features/software-templates/software-templates-index)
-  and [TechDocs](https://backstage.io/docs/features/techdocs/techdocs-overview)
+  [Software Catalog](https://backstage.io/docs/features/software-catalog/),
+  [Software Templates](https://backstage.io/docs/features/software-templates/)
+  and [TechDocs](https://backstage.io/docs/features/techdocs/)
   amongst other things.
 
 ### Troubleshooting

docs/plugins/integrating-search-into-plugins.md

@@ -146,7 +146,7 @@ Look at [DefaultTechDocsCollatorFactory test](https://github.com/backstage/backs
 
 #### 6. Make your plugins collator discoverable for others
 
-If you want to make your collator discoverable for other adopters, add it to the list of [plugins integrated to search](https://backstage.io/docs/features/search/search-overview#plugins-integrated-with-backstage-search).
+If you want to make your collator discoverable for other adopters, add it to the list of [plugins integrated to search](https://backstage.io/docs/features/search/#plugins-integrated-with-backstage-search).
 
 ## Building a search experience into your plugin