JSON schema for zowe.yaml

[lchudinov]

Proposed changes

This PR adds JSON schema for zowe.yaml

This PR depends upon the following PRs:

Type of change

• New feature (non-breaking change which adds functionality)

PR Checklist

Please delete options that are not relevant.

• If the changes in this PR are meant for the next release / mainline, this PR targets the "staging" branch.
• My code follows the style guidelines of this project (see: Contributing guideline)
• I have commented my code, particularly in hard-to-understand areas

Testing

Open zowe.yaml in the zlux-editor.

Further comments