feat: add ndarray/base/to-transposed

PR-URL: #10499
Closes: stdlib-js/metr-issue-tracker#171
Co-authored-by: Athan Reines <kgryte@gmail.com>
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: headlessNode

lib/node_modules/@stdlib/ndarray/base/to-transposed/README.md

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+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2026 The Stdlib Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# toTransposed
+
+> Return a new ndarray containing the elements of an input ndarray but whose last two dimensions are transposed.
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var toTransposed = require( '@stdlib/ndarray/base/to-transposed' );
+```
+
+#### toTransposed( x )
+
+Returns a new ndarray containing the elements of an input ndarray but whose last two dimensions are transposed.
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+
+var x = array( [ [ 1, 2, 3 ], [ 4, 5, 6 ] ] );
+// returns <ndarray>[ [ 1, 2, 3 ], [ 4, 5, 6 ] ]
+
+var out = toTransposed( x );
+// returns <ndarray>[ [ 1, 4 ], [ 2, 5 ], [ 3, 6 ] ]
+```
+
+The function accepts the following arguments:
+
+-   **x**: input ndarray.
+
+</section>
+
+<!-- /.usage -->
+
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+## Notes
+
+-   If provided an ndarray with fewer than two dimensions, the function raises an exception.
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint-disable stdlib/no-redeclare -->
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var rpad = require( '@stdlib/string/right-pad' );
+var toTransposed = require( '@stdlib/ndarray/base/to-transposed' );
+
+function print( arr, name ) {
+    var str;
+    var sh;
+    var p;
+    var i;
+    var j;
+    var k;
+
+    sh = arr.shape;
+    for ( i = 0; i < sh[0]; i++ ) {
+        str = name+'['+i+',:,:] = [ ';
+        p = str.length + 1;
+        for ( j = 0; j < sh[1]; j++ ) {
+            if ( j > 0 ) {
+                str += rpad( '\n', p, ' ' );
+            }
+            for ( k = 0; k < sh[2]; k++ ) {
+                str += arr.get( i, j, k );
+                if ( k < sh[2]-1 ) {
+                    str += ', ';
+                }
+            }
+        }
+        console.log( str + ' ]\n' );
+    }
+}
+
+// Create a data buffer:
+var buf = new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
+
+// Create a stack of matrices:
+var x = new ndarray( 'float64', buf, [ 2, 2, 3 ], [ 0, 3, 1 ], 0, 'row-major' );
+
+// Transpose the stack of matrices:
+var y = toTransposed( x );
+
+// Print the stacks:
+console.log( '' );
+print( x, 'X' );
+console.log( '' );
+print( y, 'Y' );
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="references">
+
+</section>
+
+<!-- /.references -->
+
+<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+<!-- <related-links> -->
+
+<!-- </related-links> -->
+
+</section>
+
+<!-- /.links -->