refactor: update DefaultSlideMaster attribute names to follow PascalCase convention

Author: ya7010

src/tppt/_tppt/slide_master.py

@@ -46,17 +46,16 @@ class TpptSlideMaster(metaclass=TpptSlideMasterMeta): ...
 
 GenericTpptSlideMaster = TypeVar("GenericTpptSlideMaster", bound=TpptSlideMaster)
 
-
 class DefaultSlideMaster(TpptSlideMaster):
-    master: DefaultMasterSlide
-    title: DefaultTitleSlide
-    title_and_content: DefaultTitleAndContentSlide
-    section_header: DefaultSectionHeaderSlide
-    two_content: DefaultTwoContentSlide
-    comparison: DefaultComparisonSlide
-    title_only: DefaultTitleOnlySlide
-    blank: DefaultBlankSlide
-    content_with_caption: DefaultContentWithCaptionSlide
-    picture_with_caption: DefaultPictureWithCaptionSlide
-    title_and_vertical_text: DefaultTitleAndVerticalTextSlide
-    vertical_title_and_text: DefaultVerticalTitleAndTextSlide
+    Master: DefaultMasterSlide
+    Title: DefaultTitleSlide
+    TitleAndContent: DefaultTitleAndContentSlide
+    SectionHeader: DefaultSectionHeaderSlide
+    TwoContent: DefaultTwoContentSlide
+    Comparison: DefaultComparisonSlide
+    TitleOnly: DefaultTitleOnlySlide
+    Blank: DefaultBlankSlide
+    ContentWithCaption: DefaultContentWithCaptionSlide
+    PictureWithCaption: DefaultPictureWithCaptionSlide
+    TitleAndVerticalText: DefaultTitleAndVerticalTextSlide
+    VerticalTitleAndText: DefaultVerticalTitleAndTextSlide