Add support for the namespace dataline added in RC.7

Author: gazpachoking

src/datastar_py/consts.py

@@ -38,6 +38,12 @@ class ElementPatchMode(StrEnum):
     AFTER = "after"
 
 
+class ElementPatchNamespace(StrEnum):
+    HTML = "html"
+    SVG = "svg"
+    MATHML = "mathml"
+
+
 # endregion ElementPatchMode
 
 
@@ -72,6 +78,7 @@ class EventType(StrEnum):
 # region Dataline literals
 SELECTOR_DATALINE_LITERAL = "selector"
 MODE_DATALINE_LITERAL = "mode"
+NAMESPACE_DATALINE_LITERAL = "namespace"
 ELEMENTS_DATALINE_LITERAL = "elements"
 USE_VIEW_TRANSITION_DATALINE_LITERAL = "useViewTransition"
 SIGNALS_DATALINE_LITERAL = "signals"

src/datastar_py/sse.py

@@ -89,6 +89,7 @@ def patch_elements(
         selector: str | None = None,
         mode: consts.ElementPatchMode | None = None,
         use_view_transition: bool | None = None,
+        namespace: consts.ElementPatchNamespace | None = None,
         event_id: str | None = None,
         retry_duration: int | None = None,
     ) -> DatastarEvent:
@@ -106,6 +107,8 @@ def patch_elements(
             data_lines.append(
                 f"{consts.USE_VIEW_TRANSITION_DATALINE_LITERAL} {_js_bool(use_view_transition)}"
             )
+        if namespace and namespace != consts.ElementPatchNamespace.HTML:
+            data_lines.append(f"{consts.NAMESPACE_DATALINE_LITERAL} {namespace}")
 
         if elements:
             data_lines.extend(