chore(cli): type currentAction as CliAction (#571)

`CliAction` type feels slightly off as it should be `CliAction` and not
`ToolkitAction`. This makes the default make sense. Either way, the
internal property of `CliIoHost` is typed to `CliAction`.
 
In practice this probably doesn't matter because I don't think we are
initializing `CliIoHost` with anything but `none`.

---
By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license

---------

Co-authored-by: Momo Kornher <kornherm@amazon.co.uk>

Author: kaizencc

packages/@aws-cdk/toolkit-lib/lib/api/io/toolkit-action.ts

@@ -1,5 +1,5 @@
 /**
- * The current action being performed by the CLI. 'none' represents the absence of an action.
+ * The current action being performed by the Toolkit.
  */
 export type ToolkitAction =
 | 'assembly'

packages/aws-cdk/lib/cli/io-host/cli-io-host.ts

@@ -10,6 +10,9 @@ import { StackActivityProgress } from '../../commands/deploy';
 
 export type { IIoHost, IoMessage, IoMessageCode, IoMessageLevel, IoRequest };
 
+/**
+ * The current action being performed by the CLI. 'none' represents the absence of an action.
+ */
 type CliAction =
 | ToolkitAction
 | 'context'
@@ -24,7 +27,7 @@ export interface CliIoHostProps {
    *
    * @default 'none'
    */
-  readonly currentAction?: ToolkitAction;
+  readonly currentAction?: CliAction;
 
   /**
    * Determines the verbosity of the output.