Add `client-api-proto` feature to `medea-control-api-proto`

[ilslv]

Synopsis

Add client-api-proto feature for conversions from medea-client-api-proto into medea-control-api-proto types.

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains Draft: prefix
  • [x] Name contains issue reference
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• [x] Documentation is updated (if required)
• [x] Tests are updated (if required)
• [x] Changes conform code style
• [x] CHANGELOG entry is added (if required)
• [x] FCM (final commit message) is posted
  • [x] and approved
• [x] Review is completed and changes are approved
• Before merge:
  • [x] Milestone is set
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  • [x] Draft: prefix is removed
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[ilslv]

FCM

Add `client-api` Cargo feature to `medea-control-api-proto` crate (#68)