add m_transpose

src/matrix/m_transpose.scad

@@ -0,0 +1,12 @@
+function m_transpose(m) =
+    let(
+        column = len(m[0]),
+        row = len(m)
+    )
+    [
+        for(y = 0; y < column; y = y + 1)
+        [
+            for(x = 0; x < row; x = x + 1)
+            m[x][y]
+        ]
+    ];