Speck

Update notes:
- Added AsyncOpenAI wrapper. To import, `from speck import AsyncOpenAI`

Update notes:
- Added tree logging for prompts
- Updated promptfile parsing
- Improved OpenAI wrapper

We are shifting our focus to create a new paradigm for prompting. Introducing **Promptfiles** - easily reuse and format prompts.

Main features:
1. Typed variable injection
2. Composable prompts to reuse subprompts
3. Prompt reference logging

Update notes:
- Added support for python 3.9
- Fixed some typing errors in methods

Update notes:
- Fixed minor prompt duplication bug

Update notes:
- Fixed prompt context not being initialized correctly