[bug] `integ:*:watch` doesn't work out of the box for `AwsCdkConstructLibrary`

When using awscdk.AwsCdkConstructLibrary, after adding an integration test and running yarn:foobar:watch, I get the following error message:

josh@josh-XPS-15-9550:~/proj/test-a$ yarn integ:foobar:watch
yarn run v1.22.17
$ npx projen integ:foobar:watch
👾 integ:foobar:watch | cdk watch --app "ts-node -P tsconfig.dev.json test/foobar.integ.ts" --no-version-reporting -o test/.tmp/foobar.integ/deploy.cdk.out
Cannot use the 'watch' command without specifying at least one directory to monitor. Make sure to add a "watch" key to your cdk.json
👾 Task "integ:foobar:watch" failed when executing "cdk watch --app "ts-node -P tsconfig.dev.json test/foobar.integ.ts" --no-version-reporting -o test/.tmp/foobar.integ/deploy.cdk.out" (cwd: /home/josh/proj/test-a)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I can get the watch command to work when I put cdk.json file like this in my project root:

{
  "watch": {
    "include": [
      "src/**/*.ts",
      "test/**/*.integ.ts",
      "assets/**"
    ]
  }
}

Projen should probably create this file by default.

Here’s an SSCCE: https://github.com/misterjoshua/projen-integ-deploy-bug-cdkv2

To reproduce in the SSCCE run these commands:

yarn
yarn integ:foobar:watch

[moltar]

My “proper” fix 😁

const cdkConfig = new CdkConfig(project, {
  app: '', // Required for types.
  watchIncludes: [
    `${project.srcdir}/**/*.ts`,
    `${project.testdir}/**/*.integ.ts`,
  ],
});
cdkConfig.json.addDeletionOverride('app');
cdkConfig.json.addDeletionOverride('context');
cdkConfig.json.addDeletionOverride('output');

[misterjoshua]

@Chriscbr Ah! Thanks for noticing. Yes, I’m still having this issue. I saw the stale notification and forgot to add a comment in time. Sorry about that. Yes, please re-open. 😃