Add tokens

.gitignore

@@ -1,2 +1,3 @@
 *.o
 build/*
+.vscode

src/include/tokenize.h

@@ -0,0 +1,15 @@
+#include <vector>
+using namespace std;
+
+enum class TokenType { Type, Int, Plus, Star, Slash, Minus, Equal, Semicolon, LParenthese, RParenthese };
+enum class Type { Int };
+
+union TokenData {
+    int integer;
+    Type type;
+};
+
+struct Token {
+    TokenType type;
+    TokenData data;
+};