add validation for almost junction

but avoid connect when the edge goes in parallel to the other road.
also added tests for the validation.

data/core.yaml

@@ -930,6 +930,9 @@ en:
     crossing_ways:
       message: Crossing ways without connection
       tooltip: "Roads are crossing other roads, buildings, railroads, or waterways without connection nodes or a bridge tag."
+    highway_almost_junction:
+      message: Almost junction
+      tooltip: "This node is very close but not connected to way {wid}."
     fix:
       delete_feature:
         title: Delete this feature