Initial data commit

Task/Matrix-multiplication/S-lang/matrix-multiplication.slang

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+% Matrix multiplication is a built-in with the S-Lang octothorpe operator.
+variable A = [1,2,3,4,5,6];
+reshape(A, [2,3]);             % reshape 1d array to 2 rows, 3 columns
+printf("A is %S\n", A); print(A);
+
+variable B = [1:6];            % index range, 1 to 6 same as above in A
+reshape(B, [3,2]);             % reshape to 3 rows, 2 columns
+printf("\nB is %S\n", B); print(B);
+
+printf("\nA # B is %S\n", A#B);
+print(A#B);
+
+% Multiply binary operator is different, dimensions need to be equal
+reshape(B, [2,3]);
+printf("\nA * B is %S (with reshaped B to match A)\n", A*B);
+print(A*B);