refs https://github.com/TryGhost/Team/issues/1217
- moved top-level `tenorApiKey` to `tenor:apiKey` and added `tenor:contentFilter`
- added base config to `defaults.json`
- updated `public-config.js` and API output serializer to use the new top-level `tenor` key
refs https://github.com/TryGhost/Team/issues/1217
- add `tenorApiKey` to `publicConfig.config()
- update canary config endpoint output serializer to include `tenorApiKey` when the `gifsCard` labs flag is enabled
- This isn't really a "service" - it's a set of utilities for working with labs flags
- It's also required all over the place, and doesn't require anything that isn't shared
- Therefore, it should live in shared
- This isn't really a "service" - it's a set of utilities for working with labs flags
- It's also required all over the place, and doesn't require anything that isn't shared
- Therefore, it should live in shared
no issue
- moved `config` and `site` API output generation to a `public-config` service allowing all API versions to use `publicConfig.config` or `publicConfig.site` in their query methods
- updated `config` and `site` API output serializers to use an allow-list that limits the data returned for each API version
