COOPS-UI: add copyright/license to source code

### COOPS-UI: add copyright/license to source code
## Description:

The following copyright/license (or equivalent, given different commenting syntax) should be at the top of every source code file:

```
//
// Copyright © 2020 Province of British Columbia
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
// an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
//
```

Acceptance / DoD:
- [ ] Product Owner advised if task >= 1 full-day, or forms part of the business day
- [ ] ~Requires deployments~
- [ ] ~Test coverage acceptable~
- [ ] Peer Reviewed
- [ ] ~Production burn in completed~