Custom releaser

Hello!
I would like to use oranda with other programming languages / actions.
I don't mind parsing myself and provide the final manifest to oranda.
But I'm not sure what exactly and how oranda can work in such a way.

For instance, I have the project [thewh1teagle/gcb](https://github.com/thewh1teagle/gcb)
And I would like to add oranda manually (I don't want to wait until oranda officially supports goreleaser)
I can write the logic myself to parse the releases and getting URLs + name of assets.
Plus - writing manually the project title, description etc - all the things which are parsed from `Cargo.toml`
But then how do I pass all that information to oranda?

Start by tracing how oranda currently reads Cargo.toml and constructs its release manifest. Identify the entry point or input contract needed for externally supplied project metadata, release URLs, asset names, and descriptions, then define how a custom releaser such as gcb could provide them and how that flow would be verified.

Written by the indexing model from the issue text.