Go SDK for Symbl.ai v0.3.6

Adds new properties for enhanced customization of the summary UI and brings improvements to the audio experience UI.

Allows certain fields to be optional when submitting conversations, offering greater flexibility in user input.
Introduces integration tests to ensure the stability and correctness of the new features.

What's Changed

• Audio Summary UI Customization by @subodhjenasymbl in #106

Full Changelog: v0.3.5...v0.3.6