Add response_schemas to transaction_status API

package/schemas/transaction_status_api/response_schemas.py

+from schemas.predefined import *
+
+find_transaction = Map({
+    "block_num": Int(),
+    "status": Str(
+        enum=[
+            "expired_reversible",
+            "expired_reversible",
+            "too_old",
+            "within_irreversible_block",
+            "within_mempool",
+            "within_reversible_block",
+            "unknown"
+        ])
+
+}, required_keys=["status"])