Charms

[DavidS-ovm]

Some notes compared to the original design:

• I didn't find a way to list available profiles, so this is just using the configured one ($AWS_PROFILE) or letting the user input one
• crisped up the wording of the options
• adjust the wording based on whether there is or is not $AWS_PROFILE set
• if no ticket-link or change is specified, this now uses the hash of the tfplan JSON to connect changes
• implemented ACCESSIBLE env var to enable glamour's screenreader mode
• the re-used submit-plan code still needs a UI/UX pass to improve its output using charms
• the overmind terraform plan command does require double dashes (--) to separate overmind and terraform CLI arguments to avoid confusing the cobra parser

Other changes

• a few refactorings of cmd/changes_submit_plan.go to allow re-use of existing code with more flexibility
• refactor token handling to pass through the actual oauth2.Token data for easier use in the nats token client