AndreyLevchenko

feat(api): expose go api for third party apps

4

## Description of changes: ### Exposed methods implementation: [api.go](https://github.com/aquasecurity/postee/pull/282/files#diff-282c15baa9152cf621f17a5455a9d2eed08c3d3403af8e5659b34a1024543737) Technically more methods can be accessed but these ones are going to be documented integration test: [api_integration_test.go](https://github.com/aquasecurity/postee/pull/282/files#diff-01d260cda2a61d1f22f75d332cffc872e4d2becde203480623d9b4b1bfeaad3c) ### More structures were...