try to improve the code organization (nim's namespace management is... peculiar)

bench/bench_griffin.nim

@@ -10,10 +10,8 @@ import constantine/math/arithmetic
 import constantine/math/io/io_fields
 import constantine/math/io/io_bigints
 
-import poseidon2/types
-import poseidon2/io
+import griffin
 import griffin/permutation
-
 import ./shared
 
 #-------------------------------------------------------------------------------

bench/bench_perm.nim

@@ -10,10 +10,8 @@ import constantine/math/arithmetic
 import constantine/math/io/io_fields
 import constantine/math/io/io_bigints
 
-import poseidon2/types
-import poseidon2/io
+import poseidon2
 import poseidon2/permutation
-
 import ./shared
 
 #-------------------------------------------------------------------------------

griffin.nim

@@ -0,0 +1,18 @@
+import poseidon2/types
+import poseidon2/io
+import griffin/permutation
+import griffin/compress
+
+export compress
+export perm
+export permInPlace
+
+export fromBytes
+export toBytes
+export toF
+export elements
+export types
+
+# workaround for "undeclared identifier: 'getCurveOrder'"
+import constantine/named/algebras
+export algebras

griffin/compress.nim

@@ -1,4 +1,5 @@
-import ./types
+
+import ../poseidon2/types
 import ./permutation
 
 # 2-to-1 compression

poseidon2.nim

@@ -9,6 +9,7 @@ export sponge
 export compress
 export merkle
 export spongemerkle
+
 export fromBytes
 export toBytes
 export toF