//! International System of Units (SI) with International System of Quantities (ISQ) implementation.
//!
//! Standard quantities from ISQ:
//! - Length (base unit meter, m)
//! - Mass (base unit kilogram, kg)
//! - Time (base unit second, s)
//! - Electric current (base unit ampere, A)
//! - Thermodynamic temperature (base unit kelvin, K)
//! - Amount of substance (base unit mole, mol)
//! - Luminous intensity (base unit candela, cd)
//!