chore: remove deprecated gh copilot plugin, redirect to marketplace

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>

data/redirects.yml

@@ -375,3 +375,10 @@
 
 "/ai/mcp-catalog-and-toolkit/get-started/#verify-connections":
   - /go/mcp-client-verify/
+
+# Copilot extension (deprecated)
+"https://github.com/marketplace/docker-for-github-copilot":
+  - /copilot/
+  - /copilot/install/
+  - /copilot/usage/
+  - /copilot/examples/

data/summary.yaml

@@ -166,8 +166,6 @@ Docker Desktop CLI logs:
   requires: Docker Desktop 4.39 and later
 Docker Desktop CLI kubernetes:
   requires: Docker Desktop 4.44 and later
-Docker GitHub Copilot:
-  availability: Early Access
 Docker Hardened Images:
   subscription: [Docker Hardened Images]
 Docker Hardened Image charts: