Add caching step in copilot-setup-steps.yml

Add caching step to GitHub Actions workflow for improved performance.

Signed-off-by: johnconstant99-dev <johnconstant99@gmail.com>

Author: johnconstant99-dev

.github/workflows/copilot-setup-steps.yml

@@ -0,0 +1,20 @@
+            - name: Cache
+  uses: actions/cache@v5.0.5
+  with:
+    # A list of files, directories, and wildcard patterns to cache and restore
+    path: 
+    # An explicit key for restoring and saving the cache
+    key: 
+    # An ordered multiline string listing the prefix-matched keys, that are used for restoring stale cache if no cache hit occurred for key. Note `cache-hit` returns false in this case.
+    restore-keys: # optional
+    # The chunk size used to split up large files during upload, in bytes
+    upload-chunk-size: # optional
+    # An optional boolean when enabled, allows windows runners to save or restore caches that can be restored or saved respectively on other platforms
+    enableCrossOsArchive: # optional, default is false
+    # Fail the workflow if cache entry is not found
+    fail-on-cache-miss: # optional, default is false
+    # Check if a cache entry exists for the given input(s) (key, restore-keys) without downloading the cache
+    lookup-only: # optional, default is false
+    # Run the post step to save the cache even if another step before fails
+    save-always: # optional, default is false
+