feat: add support for Decimal and Decimal score types

[Christopher-Chianelli]

• Decimal maps mostly to BigDecimal, although its floating point concepts are ignored (Python does not have an infinite precision MathContext, so it acts more like a dynamic range floating point with an adjustable precision. The precision used is shared in a thread local object that can be changed using decimal.setcontext.

• Added str constructors to float and int

• Added sanity tests for all variants of penalize/reward/impact and score types

[triceo]

Leaving some comments.

A question regarding LoadBalance - the class has a BigDecimal-returning method. I don't see any code handling that here. So the conversion to Python Decimal happens automatically?

[Christopher-Chianelli]

All Java methods that return BigDecimal are automatically translated to PythonDecimal instances.

[triceo]

LGTM after we're back to at least B in Sonar.

(We may have to disable the ThreadLocal rule there, even though it's entirely correct and points out the main reason why ThreadLocal should be avoided.)

[sonarqubecloud]

Quality Gate failed

Failed conditions
B Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

Catch issues before they fail your Quality Gate with our IDE extension SonarLint