eyaml - secrets shouldn't be this hard

Lets you encrypt inlined secrets and not worry about secret managers.

TODO: for v0.1b

• change file extension from *.yaml to *.e.yaml (allows github to pickup yaml syntax highlighting)
• add setenv command
• add vault as keystore
• add 1password as a keystore
• write readme for v1.1 rc
• make a build pipeline using github actions
• notarize and publish build for brew
• add a rotate cmd