Pybet

Fixes

- typing in `Market.derive`

Docs

- fix config ref in `.readthedocs.yaml`

Docs

- add `.readthedocs.yaml` v2 config

Others

- ruff ignore E731
- refactor `Market` testing to harmonise approaches

New Features

- `Market.derive` method

Others

- ruff ignore F821

Fixes

- make `Odds.__repr__` class specific
- allow `Odds.probability` and `Odds.percentage` class methods to operate at "never" and "always" extremes

Others

- add ruff

Fixes

- fix for `ValueError` check in `Market.meld` (was merged pre-0.6.0 but missing from release)

New Features

- `Market.meld` method