feat: Add new gcloud commands, API clients, and third-party libraries across various services.

gcloud auth application-default login/google-cloud-sdk/lib/surface/memcache/regions/list.yaml

@@ -0,0 +1,34 @@
+- release_tracks: [ALPHA, BETA, GA]
+  help_text:
+    brief: |
+      List Memorystore Memcached regions.
+    description: |
+      List all regions where Memorystore Memcached API is available.
+    examples: |
+      To list all the regions where you can create Memcached instances, run:
+
+          $ {command}
+
+  arguments:
+    resource:
+      spec: !REF googlecloudsdk.command_lib.memcache.resources:project
+      help_text: |
+        The project name.
+
+  request:
+    ALPHA:
+      api_version: v1beta2
+    BETA:
+      api_version: v1beta2
+    GA:
+      api_version: v1
+    collection: memcache.projects.locations
+
+  response:
+    id_field: name
+
+  output:
+    format: |
+      table(
+        locationId:label=NAME:sort=1
+      )