Add GitHub issues integration

[spastorelli]

This PR aims to add the GitHub issues integration.

Part https://linear.app/gitbook-x/issue/RND-8917/add-github-issues-integration

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Latest commit: ec335a6

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[pkg-pr-new]

Open in StackBlitz

bun add https://pkg.pr.new/GitbookIO/integrations/@gitbook/api@1079

commit: ec335a6

[SamyPesse]

Looks good

[SamyPesse]

What is this?

Should it be a 1password entry now? we should avoid secrets

[spastorelli]

It's the name of the app that GitHub generates based on the title of the app that we provide. We need it to build the app installation URL (btw we use a similar approach in github-copilot integration). It changes based on the environment (e.g prod app != staging app != dev app), so we need to somehow pass it via the gitbook-manifest and be able to retrive it at runtime.

We don't have to store it in 1Password and hardcode the value in the manifest. But I don't know how to pass env variables per enviroment to integration other than passing the value as a secret.

Any suggestions?