CLI: Do not execute a command if help is printed

Previously, for example `hf 14a raw -b 7 -d 26 -h` was printing help but it was also executing the command.

software/script/chameleon_cli_main.py

@@ -119,6 +119,8 @@ def exec_cmd(self, cmd_str):
         args.prog = tree_node.fullname
         try:
             args_parse_result = args.parse_args(arg_list)
+            if args.help_requested:
+                return
         except chameleon_utils.ArgsParserError as e:
             args.print_help()
             print(f'{CY}'+str(e).strip()+f'{C0}', end="\n\n")

software/script/chameleon_utils.py

@@ -43,6 +43,7 @@ def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.add_help = False
         self.description = "Please enter correct parameters"
+        self.help_requested = False
 
     def exit(self, status: int = 0, message: Union[str, None] = None):
         if message:
@@ -98,6 +99,8 @@ def print_help(self):
         if len(lines) > 0:
             lines[0] = f'{CG}{lines[0]}{C0}'
             print('\n'.join(lines))
+        print('')
+        self.help_requested = True
 
 
 def expect_response(accepted_responses: Union[int, list[int]]) -> Callable[..., Any]: