[widgets][toolchaineditor] toolchain configuration

beat/editor/widgets/space_nodes_config.json

+{
+	"drawing_space_config":{
+		"scene_width": 2000,
+		"scene_height": 2000,
+		"grid_size": 36
+	},
+	"block_config":{
+		"width": 200,
+		"height": 25,
+		"radius": 10,
+		"border": 1,
+		"font": "Arial",
+		"font_size": 12,
+		"pin_height": 30,
+		"pin_font": "Arial",
+		"pin_font_size": 10,
+        "pin_color": [255, 155, 0, 255],
+        "background_color": [80, 80, 80, 255],
+        "border_color": [50, 50, 50, 255],
+        "selection_border_color": [170, 80, 80, 255],
+        "text_color": [0, 0, 0, 255]
+	},
+	"connection_config":{
+		"width": 2,
+    	"color": [255, 155, 0, 255]
+	}
+}