Adds two custom cli flags:
- `StringMapFlag` parses JSON to string map used for plugin map options
- `StringSliceFlag` parses comma-separated plugin slice options to slice and supports escaping
Reviewed-on: https://codeberg.org/woodpecker-plugins/go-plugin/pulls/48
Reviewed-by: Patrick Schratz <pat-s@noreply.codeberg.org>
Co-authored-by: Robert Kaussow <mail@thegeeklab.de>
Co-committed-by: Robert Kaussow <mail@thegeeklab.de>