[add] Python client packaging first draft

tests/ragger/eip712_input_files/02-recipients_array_mail-data.json

@@ -0,0 +1,55 @@
+{
+    "domain": {
+        "chainId": 1,
+        "name": "Recipients Array Mail",
+        "verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC",
+        "version": "1"
+    },
+    "message": {
+        "contents": "Hello, Bob!",
+        "from": {
+            "name": "Cow",
+            "wallets": [
+                "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826",
+                "0xDeaDbeefdEAdbeefdEadbEEFdeadbeEFdEaDbeeF"
+            ]
+        },
+        "to": [
+            {
+                "name": "Alice",
+                "wallets": [
+                    "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB",
+                    "0xB0B0b0b0b0b0B000000000000000000000000000"
+                ]
+            },
+            {
+                "name": "Bob",
+                "wallets": [
+                    "0xB0BdaBea57B0BDABeA57b0bdABEA57b0BDabEa57"
+                ]
+            }
+        ]
+    },
+    "primaryType": "Mail",
+    "types": {
+        "EIP712Domain": [
+            { "name": "name", "type": "string" },
+            { "name": "version", "type": "string" },
+            { "name": "chainId", "type": "uint256" },
+            { "name": "verifyingContract", "type": "address" }
+        ],
+        "Group": [
+          { "name": "name", "type": "string" },
+          { "name": "members", "type": "Person[]" }
+        ],
+        "Mail": [
+            { "name": "from", "type": "Person" },
+            { "name": "to", "type": "Person[]" },
+            { "name": "contents", "type": "string" }
+        ],
+        "Person": [
+            { "name": "name", "type": "string" },
+            { "name": "wallets", "type": "address[]" }
+        ]
+    }
+}