Skip-Wake-Words Support in Intent Service

[NeonDaniel]

Objective

Allow intent handling based on matched intent or presence of an "activation word" in an input utterance.

Initial Implementation Goals

• [ ] Add user preference to default allow or deny intent handling without an activation word (when SWW)
• [ ] Handle configured whitelisted intents that can be called without requiring an activation word (when SWW)
• [ ] Handle configured blacklisted intents that cannot be called unless an activation word is present (when SWW)
• [ ] Optionally add decorator for intents to declare default behavior?
• [ ] Optionally implement an audio parser to detect a wake word in recorded speech
• [ ] Implement a text parser to detect a configurable wake word in transcribed speech (maybe just a voc_match plugin)

[NeonDaniel]

Consider rolling into user auth. Also depends on https://github.com/NeonGeckoCom/neon_speech/issues/41