chore: style

Merge pull request #72 from zhudotexe/v181

v1.9

feat(cli): allow extension packages to define CLI providers

Resolves #63

chore: bump version

chore: fmt

docs: saveload, message extras, some cleanup

fix: always use parse_tool_calls even when no functions are supplied

Fixes GPT-OSS parsing w/ no tool calls

chore: show_reasoning_in_stream docs

chore: bump version

chore: bump version