Move RSS redirects to top and add parameter variants

Moved RSS feed redirects to the very top of the redirects list to ensure
they are evaluated before any static file handlers. Also added:
- Trailing slash variants (ts.rss/, csharp.rss/)
- Parameterized extension variants (ts.:ext, csharp.:ext)

This attempts to work around the issue where .rss files are being caught
by a static file handler (x-matched-path: /[host]/[domain]/static/[slug])
before the redirect rules are evaluated.

Co-Authored-By: Niels Swimberghe <[email protected]>

Author: devin-ai-integration[bot]

fern/docs.yml

@@ -170,6 +170,32 @@ experimental:
 # Redirects for new docs structure migration
 redirects:
 
+  # ============================================================================
+  # RSS FEED REDIRECTS (must be first to avoid static handler)
+  # ============================================================================
+  
+  # Exact RSS redirects
+  - source: /learn/sdks/introduction/changelog/ts.rss
+    destination: /learn/sdks/generators/typescript/changelog.rss
+  - source: /learn/sdks/introduction/changelog/csharp.rss
+    destination: /learn/sdks/generators/csharp/changelog.rss
+  - source: /learn/cli-reference/changelog.rss
+    destination: /learn/cli-api-reference/cli-reference/changelog.rss
+  
+  # RSS redirects with trailing slash
+  - source: /learn/sdks/introduction/changelog/ts.rss/
+    destination: /learn/sdks/generators/typescript/changelog.rss
+  - source: /learn/sdks/introduction/changelog/csharp.rss/
+    destination: /learn/sdks/generators/csharp/changelog.rss
+  - source: /learn/cli-reference/changelog.rss/
+    destination: /learn/cli-api-reference/cli-reference/changelog.rss
+  
+  # Parameterized extension variants
+  - source: /learn/sdks/introduction/changelog/ts.:ext
+    destination: /learn/sdks/generators/typescript/changelog.rss
+  - source: /learn/sdks/introduction/changelog/csharp.:ext
+    destination: /learn/sdks/generators/csharp/changelog.rss
+
   # ============================================================================
   # GENERAL REDIRECTS
   # ============================================================================
@@ -236,15 +262,6 @@ redirects:
     destination: /learn/sdks/overview/project-structure
   - source: /learn/sdks/introduction/customer-showcase
     destination: /learn/sdks/customer-showcase
-  
-  # RSS feed redirects (must be before wildcard redirects to match correctly)
-  - source: /learn/sdks/introduction/changelog/ts.rss
-    destination: /learn/sdks/generators/typescript/changelog.rss
-  - source: /learn/sdks/introduction/changelog/csharp.rss
-    destination: /learn/sdks/generators/csharp/changelog.rss
-  - source: /learn/cli-reference/changelog.rss
-    destination: /learn/cli-api-reference/cli-reference/changelog.rss
-  
   - source: /learn/sdks/introduction/changelog/ts/:slug*
     destination: /learn/sdks/generators/typescript/changelog/:slug*
   - source: /learn/sdks/introduction/changelog/python/:slug*