As of #2520
Support to load new forges and agent backends at runtime using go's
plugin system. (https://pkg.go.dev/plugin)
I also added a simple example addon (a new forge which just prints log
statements), it should be removed later of course, but you can see an
example.
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Co-authored-by: Michalis Zampetakis <mzampetakis@gmail.com>
Co-authored-by: Anbraten <anton@ju60.de>
