Streamline Python file headers somewhat

- Add coding statement
  - Import all modules in one line where possible
  - Order: __future__, typing, plain imports, from imports,
    janware modules

Signed-off-by: Jan Lindemann <jan@janware.com>

tools/python/jwutils/db/rows.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 
-import io
-import os, re, textwrap, json, csv
+import io, os, re, textwrap, json, csv
 from tabulate import tabulate # type: ignore
 
 from jwutils.log import *

tools/python/jwutils/db/schema/Column.py

@@ -4,9 +4,8 @@ from typing import Optional, Any
 
 import abc
 
-from ...log import *
-
 from .DataType import DataType
+from ...log import *
 
 class Column(abc.ABC): # export
 

tools/python/jwutils/db/schema/DataType.py

@@ -1,11 +1,11 @@
 # -*- coding: utf-8 -*-
 
 from typing import Optional
-
-from ...log import *
 from enum import Enum, auto
 from datetime import datetime
 
+from ...log import *
+
 class Id(Enum):
     Integer = auto()
     SmallInteger = auto()