Fix import errors: add missing imports for Enum and dataclass in parser.py, fix indentation in core.py

Author: sdirishguy

shellrosetta/core.py

@@ -2,6 +2,7 @@
 
 
 from typing import Optional, Tuple
+from .mappings import (
     LINUX_TO_PS, PS_TO_LINUX,
     LS_FLAGS_MAP, RM_FLAGS_MAP, CP_FLAGS_MAP, MV_FLAGS_MAP,
     GREP_FLAGS_MAP, FIND_FLAGS_MAP, CAT_FLAGS_MAP

shellrosetta/parser.py

@@ -2,7 +2,11 @@
 
 
 import re
+import shlex
+from enum import Enum
+from dataclasses import dataclass
 from typing import Dict, List, Optional, Tuple, Union
+
 class NodeType(Enum):
     COMMAND = "command"
     ARGUMENT = "argument"