NextControl Linear Algebra

A Kotlin wrapper around EJML's SimpleMatrix for NextControl's linear algebra needs. There are two flavors: Matrix<R, C>/Vector<N>, which use Nat phantom types so dimension mismatches are caught at compile time, and DynamicMatrix/DynamicVector, which check dimensions at runtime for cases where the size isn't known ahead of time.

Both support the usual operations — arithmetic, transpose, inverse, pseudo-inverse, norm, solving linear systems, matrix exponentiation — plus the common decompositions (Cholesky/LLT, LDLT, LU, QR) and builder helpers (buildMatrix, matrixOf, vectorOf) for writing matrices and vectors as literals. This module is the numerical backbone the control module's state-space and estimation code is built on.