Add new bin/ops scripts

Story

As a devops engineer, I would like to script some currently manual tasks, So that I can stop making mistakes the first time I set up an environment

Solution

### Tasks
- [ ] tf_to_aws_env script - set up ENV vars so that `aws s3` commands work given the secrets.backend.tfvars file
- [ ] tf_to_gh_env script - set up github actions environment secrets from secrets.backend.tfvars and secrets.cicd.tfvars
- [ ] investigate possibility of tf_to_circleci_env script

Acceptance Criteria

• can add all secrets values needed for deployment to a github environment in a single script