start rewriting the parser to return with error messages so errors can be caught

src/parser/assignable/identifier/identifier.c

@@ -4,9 +4,9 @@
 #include <string.h>
 #include "../../../memory.h"
 
-ParsedValue *parse_identifier(Token *token) {
+ParsedValueReturn parse_identifier(Token *token) {
   ParsedValue *parsedValue = checked_malloc(sizeof(ParsedValue));
   parsedValue->type = AST_IDENTIFIER;
   parsedValue->data = strcpy(checked_malloc(strlen(token->value) + 1), token->value);
-  return parsedValue;
+  return (ParsedValueReturn){no_err, parsedValue};
 }