CLI flags should not be case-sensitive (`apiops -v` fails, `-V` works)

### Command that triggered the bug

`apiops -v`

### Expected behavior

Both `apiops -v` and `apiops -V` should print the installed CLI version. Users commonly expect short flags to be case-insensitive, and `-v` is the conventional lowercase form for "version" across most CLIs.

### Actual behavior

Only `apiops -V` prints the version. `apiops -v` fails / is not recognized as the version flag. This is inconsistent and surprising for users.

Ideally, command-line short flags in general should not be case-sensitive — or at minimum, `-v` should be aliased to `-V` (and `--version`) for the version output.

### apiops CLI version

0.4.0-alpha.1

### Environment details

- OS: Windows 11
- Shell: PowerShell 7.6.3
- Node.js: v24.0.1
- npm: 11.11.0

### CI/CD environment

N/A (running locally)

### Is this bug blocking you?

No

Start at the TypeScript CLI argument-parsing entry point and reproduce the behavior with `apiops -v` and `apiops -V` in the reported environment. Trace how `-V` and `--version` are registered; done means lowercase `-v` also prints the installed version without breaking existing flags.

索引モデルが issue の本文から書いたものです。