STT+TTS Request: elhuyar (basque)

[JarbasAl]

We should create a OPM plugin based on MycroftAI/mycroft-core#2961 (comment)

For proper language support we should aim to have plugins for as many languages as possible, specially those who we know have an active community.

This does not necessarily bring extra compatibility right now, but future proofs ovos-core while enabling more use cases:

• we can be sure OPM plugins always work in mycroft and standalone (no mycroft needed!)
• we do not know when a mycroft plugin will break compatibility (eg, by depending on a new import we didnt sync yet)

• mycroft-tts-plugin-elhuyar (also on PyPI)

• mycroft-stt-plugin-elhuyar (also on PyPI)