UI: Ongoing redesign

As our product kept evolving, we realized the necessity of a more consistent and user-friendly design for the Speechify AI API dashboard. We have been working on a redesign of the user interface to make it more accessible and user-friendly. The new design includes a more modern and cleaner look, as well as better accessibility and usability features. Please let us know if you have any feedback or suggestions for further improvements.

We have finished redesigning the major parts of the dashboard, such as the navigation menu, text to speech page, voice cloning page (used to be part of the single Playground), and the API key management page. We are currently working on redesigning the remaining parts of the dashboard, such as the billing section.