Discuss the need of access to multiple service instances

[hlxid]

Description

Currently a bundle can have access to only one service instance per service type. We need to discuss if we want to support that a bundle could use multiple instances of a single service type. This is needed if a bundle needs access to e.g. multiple twitch accounts or multiple ftp servers.

References

Todo comment:

nodecg-io/nodecg-io-core/extension/index.ts

Line 9 in a4896b3

// TODO: allow bundles to depend on more than one instance of a service type. One solution could be to add a index to ServiceDependency