v0.6.9

What's new?

• fix: Improper incomplete chat history generation.
• feat: Load intro from chat history file. (first line)
• feat: Set new intro on the fly. (console)
• feat: en-US-Wavenet-C - default voice for speech synthesis.
• fix: Perplexity AI raising json.decoder.JSONDecodeError

Full Changelog: v0.6.8...v0.6.9