Add GNU AGPL license header for files not in phoenix folder.

[dhruvpeter]

All files with xxxx- 2021 Copyright are added with the following GNU AGPL license header.
(xxxx includes years from 2013 to 2019)
#186

  GNU AGPL-3.0 License
  
  Modified Work Copyright (c) 2021 - present core.ai . All rights reserved.
  Original work Copyright (c) xxxx- 2021 Adobe Systems Incorporated. All rights reserved.
  
  This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
  
  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
  
  You should have received a copy of the GNU Affero General Public License along with this program. If not, see https://opensource.org/licenses/AGPL-3.0.

[abose]

Thanks @dhruvpeter for the changes.