doc: add license information for remark-cli
The LICENSE file was not originally included when remark-cli was vendored. This Commit adds the LICENSE file back to tools/remark-cli and updates the top level license in the project
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The LICENSE file was not originally included when remark-cli was vendored. This Commit adds the LICENSE file back to tools/remark-cli and updates the top level license in the project