feat: Add Wick species files

HepLean/FeynmanDiagrams/Wick/Algebra.lean

@@ -101,4 +101,5 @@ informal_lemma timeOrder_pair where
     ``contraction]
 
 /-! TODO: Need to set up data and structure for vaccum expectation values. -/
+
 end TwoComplexScalar

HepLean/FeynmanDiagrams/Wick/Species.lean

@@ -0,0 +1,22 @@
+/-
+Copyright (c) 2024 Joseph Tooby-Smith. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+Authors: Joseph Tooby-Smith
+-/
+import HepLean.FeynmanDiagrams.Wick.String
+/-!
+
+# Wick Species
+
+Note: There is very likely a much better name for what we here call a Wick Species.
+
+A Wick Species is a structure containing the basic information needed to write wick contractions
+for a theory, and calculate their corresponding Feynman diagrams.
+
+-/
+
+/-! TODO: There should be some sort of notion of a group action on a Wick Species. -/
+namespace Wick
+
+
+end Wick