chore: return workspace setting with default value

docs/apidocs.swagger.yaml

@@ -691,21 +691,6 @@ paths:
             $ref: '#/definitions/googlerpcStatus'
       tags:
         - WorkspaceService
-  /api/v1/workspace/settings:
-    get:
-      summary: ListWorkspaceSetting returns the list of settings.
-      operationId: WorkspaceSettingService_ListWorkspaceSettings
-      responses:
-        "200":
-          description: A successful response.
-          schema:
-            $ref: '#/definitions/v1ListWorkspaceSettingsResponse'
-        default:
-          description: An unexpected error response.
-          schema:
-            $ref: '#/definitions/googlerpcStatus'
-      tags:
-        - WorkspaceSettingService
   /api/v1/workspace/{name}:
     get:
       summary: GetWorkspaceSetting returns the setting by name.
@@ -2137,8 +2122,7 @@ definitions:
 
           Note: this functionality is not currently available in the official
           protobuf release, and it is not used for type URLs beginning with
-          type.googleapis.com. As of May 2023, there are no widely used type server
-          implementations and no plans to implement one.
+          type.googleapis.com.
 
           Schemes other than `http`, `https` (or the empty scheme) might be
           used with implementation specific semantics.
@@ -2173,7 +2157,7 @@ definitions:
             foo = any.unpack(Foo.getDefaultInstance());
           }
 
-       Example 3: Pack and unpack a message in Python.
+      Example 3: Pack and unpack a message in Python.
 
           foo = Foo(...)
           any = Any()
@@ -2183,7 +2167,7 @@ definitions:
             any.Unpack(foo)
             ...
 
-       Example 4: Pack and unpack a message in Go
+      Example 4: Pack and unpack a message in Go
 
            foo := &pb.Foo{...}
            any, err := anypb.New(foo)
@@ -2203,7 +2187,7 @@ definitions:
       name "y.z".
 
       JSON
-      ====
+
       The JSON representation of an `Any` value uses the regular
       representation of the deserialized, embedded message, with an
       additional field `@type` which contains the type URL. Example:
@@ -2543,14 +2527,6 @@ definitions:
         items:
           type: object
           $ref: '#/definitions/v1Webhook'
-  v1ListWorkspaceSettingsResponse:
-    type: object
-    properties:
-      settings:
-        type: array
-        items:
-          type: object
-          $ref: '#/definitions/apiv1WorkspaceSetting'
   v1MathBlockNode:
     type: object
     properties: