Export Speech-to-Text Endpoint

[ijemmao]

Describe your changes

• Expose a new /speech-to-text endpoint in the v2 router to allow for speech transcription
  • This endpoint will expect an incoming payload of either a publicly hosted audio URI or a Base 64 string
• Move @sendgrid/mail logic to conditional blocks of code to prevent from interfering with Jest tests
• Introduce DeveloperUsage collection type which tracks generate API usage for the different API types that we currently offer or plan to offer
• Add new and update existing Jest tests + update Jest global configurations

Issue ticket number and link

N/A

Motivation and Context

We want to add more features and functionality to the Igbo API! IgboSpeech has currently been delivered to users via a demo website. However, the ultimate final form we want for IgboSpeech is for it to be served via a REST API to enable any developer to use the technology in their own projects.

How Has This Been Tested?

• Created new and updated existing tests
• Ran all tests locally and relying on GitHub Actions to confirm all tests are passing in a new environment

Screenshots (if appropriate):

N/A

[ebubae]

These changes look great! This will be the first of many AI features in the Igbo API 🥳

The developer usage will be really crucial for billing and having users understand their charges.