feat(quantity): create @archetypes/quantity module

[gregswindle]

Feature Request

1. User story

As an API consumer,
I need to consistently compare and calculate amounts of things
In order to express quantitative relationships.

2. Acceptance criteria

We'll be done when we can represent quantities with a:

• 1. Metric, which represents a standard of measurement for quantities
• 2. Unit, which represents a type of Metric that is part of a SystemOfUnits
• 3. SystemOfUnits, which represents a set of related Units defined by a standard such as the International System of Units (SI)
• 4. DerivedUnit, which represents a combination of one or more base Units according to a specific equation
• 5. DerivedUnitTerm, which represents a term (i.e., a single Unit and its power, e.g., s–1) within a DerivedUnit
• 6. Quantity, which specifies an amount that is measured in some Metric, and uses
• 6.1. Arithmetic operations (add, subtract, multiply, and divide)
• 6.2. Comparison operations (equalTo, greaterThan, lessThan)
• 6.3. RoundingPolicy to define the mathematical semantics of the rounding operation
• 6.4. RoundingStrategy to represent the type of rounding to be applied
• 7. StandardConversion, which defines a conversionFactor that can be used to convert a Quantity in a source Unit to a Quantity in a target Unit
• 8. UnitConverter, which represents the conversion process
• 9. SIBaseUnit, which represents one of the base units defined in SI
• 9.1. Meter: SI unit of length
• 9.2. Kilogram: SI unit of mass
• 9.3. Second: SI unit of time
• 9.4. Ampere: SI unit of electric current
• 9.5. Kelvin: SI unit of temperature
• 9.6. Mole: SI unit of amount of substance
• 9.7. Candela: SI unit of luminous intensity

3. Notes

⌦ Provide additional information here, if you need to.