Add experimental x-client-transaction-id support (#1324)

* Add experimental x-client-transaction-id support

* Remove broken test

src/experimental/parser/tid.nim

@@ -0,0 +1,8 @@
+import jsony
+import ../types/tid
+export TidPair
+
+proc parseTidPairs*(raw: string): seq[TidPair] =
+  result = raw.fromJson(seq[TidPair])
+  if result.len == 0:
+    raise newException(ValueError, "Parsing pairs failed: " & raw)

src/experimental/types/tid.nim

@@ -0,0 +1,4 @@
+type
+  TidPair* = object
+    animationKey*: string
+    verification*: string