Add: config option alias.

Author: ya7010

cmdcomp/app.py

@@ -43,6 +43,7 @@ def run(cls, args: list[str] | None = None) -> None:
 
         parser.add_argument(
             "--file",
+            "--config",
             "-f",
             required=True,
             type=FileType("rb"),

docs/data/help.txt

@@ -8,7 +8,8 @@ Options:
   --version             show program's version number and exit
   --verbose, --no-verbose
                         output verbose log.
-  --file, -f FILE       config file path. supported formats are ".json",
+  --file, --config, -f FILE
+                        config file path. supported formats are ".json",
                         ".yaml", ".toml" and ".jinja".
   --shell-type {bash,zsh}
                         target shell type.