chore: fix JavaScript lint errors (issue #8061)

Move Foo constructor function to module scope to resolve the
stdlib/no-unnecessary-nested-functions lint error.

The function was previously defined inside the benchmark function
but has been moved to module scope with appropriate JSDoc comments.

Author: tysoncung

lib/node_modules/@stdlib/utils/properties/benchmark/benchmark.js

@@ -28,31 +28,41 @@ var pkg = require( './../package.json' ).name;
 var properties = require( './../lib' );
 
 
+// FUNCTIONS //
+
+/**
+* Constructor function for creating benchmark test objects.
+*
+* @private
+* @constructor
+* @returns {Foo} Foo instance
+*/
+function Foo() {
+	this.a = 'beep';
+	this.b = 'boop';
+	this.c = [ 1, 2, 3 ];
+	this.d = {};
+	this.e = null;
+	this.f = randu();
+	defineProperty( this, 'g', {
+		'value': 'bar',
+		'configurable': true,
+		'writable': true,
+		'enumerable': false
+	});
+	return this;
+}
+
+Foo.prototype.h = [ 'foo' ];
+
+
 // MAIN //
 
 bench( pkg, function benchmark( b ) {
 	var out;
 	var obj;
 	var i;
 
-	function Foo() {
-		this.a = 'beep';
-		this.b = 'boop';
-		this.c = [ 1, 2, 3 ];
-		this.d = {};
-		this.e = null;
-		this.f = randu();
-		defineProperty( this, 'g', {
-			'value': 'bar',
-			'configurable': true,
-			'writable': true,
-			'enumerable': false
-		});
-		return this;
-	}
-
-	Foo.prototype.h = [ 'foo' ];
-
 	obj = new Foo();
 
 	b.tic();