Add missing schema file

[1000TurquoisePogs]

Proposed changes

Cleans up manifest and adds missing schema file so that this can be installed using configmgr validation.

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)

PR Checklist

Please delete options that are not relevant.

• [x] If the changes in this PR are meant for the next release / mainline, this PR targets the "staging" branch.
• [x] My code follows the style guidelines of this project (see: Contributing guideline)
• [x] New and existing unit tests pass locally with my changes
• [x] Relevant update to CHANGELOG.md
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works, or describe a test method below

Testing

Run zwe components install --component path/to/this and see if it succeeds. previously, it would not when zowe.useConfigmgr=true, but now it should.