add identifier to parser

src/parser/identifier/identifier.c

@@ -0,0 +1,12 @@
+#include "identifier.h"
+#include "../../lexer/token.h"
+#include "../parser.h"
+#include <stdlib.h>
+#include <string.h>
+
+ParsedValue *parse_identifier(Token *token) {
+  ParsedValue *parsedValue = malloc(sizeof(ParsedValue));
+  parsedValue->type = AST_IDENTIFIER;
+  parsedValue->data = strcpy(malloc(sizeof(token->value)), token->value);
+  return parsedValue;
+}