feat: update namespace TypeScript declarations

PR-URL: #2690
Co-authored-by: Athan Reines <kgryte@gmail.com>
Reviewed-by: Athan Reines <kgryte@gmail.com> 
Signed-off-by: stdlib-bot <82920195+stdlib-bot@users.noreply.github.com>

Author: stdlib-bot

lib/node_modules/@stdlib/lapack/base/docs/types/index.d.ts

@@ -20,12 +20,46 @@
 
 /* eslint-disable max-lines */
 
+import dlacpy = require( '@stdlib/lapack/base/dlacpy' );
 import dlaswp = require( '@stdlib/lapack/base/dlaswp' );
 
 /**
 * Interface describing the `base` namespace.
 */
 interface Namespace {
+	/**
+	* Copies all or part of a matrix `A` to another matrix `B`.
+	*
+	* @param order - storage layout of `A` and `B`
+	* @param uplo - specifies whether to copy the upper or lower triangular/trapezoidal part of matrix `A`
+	* @param M - number of rows in matrix `A`
+	* @param N - number of columns in matrix `A`
+	* @param A - input matrix
+	* @param LDA - stride of the first dimension of `A` (a.k.a., leading dimension of the matrix `A`)
+	* @param B - output matrix
+	* @param LDB - stride of the first dimension of `B` (a.k.a., leading dimension of the matrix `B`)
+	* @returns `B`
+	*
+	* @example
+	* var Float64Array = require( '@stdlib/array/float64' );
+	*
+	* var A = new Float64Array( [ 1.0, 2.0, 3.0, 4.0 ] );
+	* var B = new Float64Array( 4 );
+	*
+	* ns.dlacpy( 'row-major', 'all', 2, 2, A, 2, B, 2 );
+	* // B => <Float64Array>[ 1.0, 2.0, 3.0, 4.0 ]
+	*
+	* @example
+	* var Float64Array = require( '@stdlib/array/float64' );
+	*
+	* var A = new Float64Array( [ 0.0, 1.0, 2.0, 3.0, 4.0 ] );
+	* var B = new Float64Array( [ 0.0, 0.0, 11.0, 312.0, 53.0, 412.0 ] );
+	*
+	* ns.dlacpy.ndarray( 'all', 2, 2, A, 2, 1, 1, B, 2, 1, 2 );
+	* // B => <Float64Array>[ 0.0, 0.0, 1.0, 2.0, 3.0, 4.0 ]
+	*/
+	dlacpy: typeof dlacpy;
+
 	/**
 	* Performs a series of row interchanges on a matrix `A` using pivot indices stored in `IPIV`.
 	*