feat: Add line chart type

Author: xmatthias

freqtrade/ft_types/plot_annotation_type.py

@@ -5,7 +5,7 @@
 from typing_extensions import TypedDict
 
 
-class AnnotationType(TypedDict, total=False):
+class _BaseAnnotationType(TypedDict, total=False):
     type: Required[Literal["area", "line"]]
     start: str | datetime
     end: str | datetime
@@ -16,4 +16,16 @@ class AnnotationType(TypedDict, total=False):
     z_level: int
 
 
+class AreaAnnotationType(_BaseAnnotationType, total=False):
+    type: Literal["area"]
+
+
+class LinenAnnotationType(_BaseAnnotationType, total=False):
+    type: Literal["line"]
+    width: int
+    line_style: Literal["solid", "dashed", "dotted"]
+
+
+AnnotationType = AreaAnnotationType | LinenAnnotationType
+
 AnnotationTypeTA = TypeAdapter(AnnotationType)