Added new connection styles

BEdit/src/bedit/gui/graphics/connection_styles.py

@@ -0,0 +1,25 @@
+from dataclasses import dataclass
+
+from PySide6.QtCore import Qt
+
+
+@dataclass(frozen=True)
+class ConnectionStyle:
+    color: str = "#285f9e"
+    selected_color: str = "#f59e0b"
+    width: float = 2.5
+    selected_width: float = 4.0
+    line_style: Qt.PenStyle = Qt.PenStyle.SolidLine
+    arrow_at_source: bool = False
+    arrow_at_target: bool = True
+    arrow_size: float = 10.0
+
+
+# This is the intentional code-level styling point for every port/connection type.
+CONNECTION_STYLES: dict[str, ConnectionStyle] = {
+    "signal": ConnectionStyle(),
+}
+
+
+def connection_style(port_type: str) -> ConnectionStyle:
+    return CONNECTION_STYLES.get(port_type, ConnectionStyle())