Implement `Discord` and `OpenTelemetry` transport!

Both transports are available for install at @caravan-logger/{name}-transport.

What's Changed

• feat(transports): implement OpenTelemetry transport by @carlos-menezes in #8
• feat(transports): add DiscordTransport by @carlos-menezes in #12

Full Changelog: https://github.com/carlos-menezes/caravan/commits/v0.1.0