chore: import upstream snapshot with attribution

easygraph/functions/__init__.py

@@ -0,0 +1,21 @@
+from easygraph.functions.basic import *
+from easygraph.functions.centrality import *
+from easygraph.functions.community import *
+from easygraph.functions.components import *
+from easygraph.functions.core import *
+from easygraph.functions.drawing import *
+from easygraph.functions.graph_embedding import *
+from easygraph.functions.graph_generator import *
+from easygraph.functions.isolate import *
+from easygraph.functions.path import *
+from easygraph.functions.structural_holes import *
+
+
+try:
+    from easygraph.functions.hypergraph import *
+except:
+    print(
+        "Warning raise in module:model.Please install "
+        "Pytorch before you use functions"
+        " related to Hypergraph"
+    )