website: Use Docusaurus Frontmatter for badges (#12893)

website/docs: Reduce redundant usage of badges. Move badge logic to components.

- Fix JSX class name warning.
- Remove duplicate titles.
- Flesh out `support_level` frontmatter.

website/docs/add-secure-apps/providers/proxy/_caddy_standalone.md

@@ -1,6 +1,6 @@
 Use the following configuration:
 
-```
+```apacheconf
 app.company {
     # directive execution order is only as stated if enclosed with route.
     route {
@@ -26,7 +26,7 @@ app.company {
 
 If you're trying to proxy to an upstream over HTTPS, you need to set the `Host` header to the value they expect for it to work correctly.
 
-```
+```conf
 reverse_proxy /outpost.goauthentik.io/* https://outpost.company {
     header_up Host {http.reverse_proxy.upstream.hostport}
 }