Draft: Implement Dim Auto Flip Text

Fixes #19993.

* To determine the `FlipText` value the normal (either the working plane Z axis or its reverse) and the working plane X axis are used.
* A new fine-tuning parameter `DimAutoFlipText` can be used to disable the functionality. Its default value is `True`.
* The `FlipText` property did not work for angular dimensions and the `TextSpacing` property of angular dimensions was not multiplied by `ScaleMultiplier`. This has been corrected.

src/Mod/Draft/draftutils/params.py

@@ -388,6 +388,7 @@ def _get_param_dictionary():
         "DefaultDisplayMode":          ("int",       0),
         "DefaultDrawStyle":            ("int",       0),
         "DefaultPrintColor":           ("unsigned",  255),
+        "DimAutoFlipText":             ("bool",      True),
         "Draft_array_fuse":            ("bool",      False),
         "Draft_array_Link":            ("bool",      True),
         "FilletRadius":                ("float",     100.0),