Add raw mode option to preserve original value formats

[realfishsam]

Description

Currently, the API automatically converts certain values (e.g., 50c → 0.5). While this normalization is helpful in many cases, it would be beneficial to add a raw mode option that allows users to retrieve values in their original format without automatic conversion.

Use Case

Some users may want to work with values exactly as they come from the source markets (Polymarket, Kalshi, etc.) without any transformation. A raw tag or mode parameter would provide more flexibility.

[alexandretrotel]

Working on it!

[alexandretrotel]

@realfishsam opened a PR at #49, tell me if I need to change anything. I couldn't do proper testing since I don't have API key, I expected the CI to run tests against your own API keys.