Improve wxListColumnFormat documentation

Don't document wxListColumnFormat as being MSW-only as it is supported
in the generic wxListCtrl version used under the other platforms since a
very long time, see e1e1272f20 (implemented support for column label
alignment (closes #19416), 2003-01-02), too.

Do mention that the first column is always left-aligned in the MSW
native control and document a workaround for creating non-left-aligned
first column.

See #24548.

interface/wx/listctrl.h

@@ -80,7 +80,7 @@ enum
     wxLIST_ALIGN_SNAP_TO_GRID
 };
 
-/// Column format (MSW only except wxLIST_FORMAT_LEFT)
+/// Column format determining alignment of the items in the column.
 enum wxListColumnFormat
 {
     wxLIST_FORMAT_LEFT,
@@ -359,6 +359,12 @@ public:
         column after all the existing ones without having to specify its
         position explicitly.
 
+        Note that under MSW the first column always uses left alignment due to
+        the limitation of the underlying native control. If you need to use a
+        different alignment for the first column, add a dummy column, then add
+        another column with the desired alignment and finally call
+        DeleteColumn() to remove the dummy one to achieve the desired result.
+
         @since 2.9.4
      */
     long AppendColumn(const wxString& heading,