- use `Unmarshal` method of viper
- move config loading, defaulting and stuff to config package
- move serve to an extra command and move keep only global flags in root command
- add startup logic to onInit method in root command
- update mocks
- clean config structs
- adopt changes in plugins
- update default config
- apply changes in proxy plugin and TLS interceptor
- add HTTPS proxy support
- move ca-generation command to main app
- minor refactoring to improve API stability
- move mocks to extra packages to avoid cycling imports
- fix bug in multi-port configuration
- change HTTP proxy to redirect to HTTP mock instead of maintaining custom rules
- introduce new endpoints module
- introduce Endpoint and EndpointManager
- introduce new Logging abstraction API to allow proper mocking
- add error return value to Start and Shutdown of endpoints
- add mocks of some internals to allow easier testing
- add generate target to take care of all code generation
- HTTPS configuration is till missing
- fix a few minor things in other plugins
- cleanup of config to reduce repeating of the same values multiple times
