feat: consolidate 'hermes version' into 'hermes --version', remove the subcommand

'hermes --version' (and -V) now prints the full version report — banner
version line with upstream SHA, install directory, authoritative install
method, Python and OpenAI SDK versions, and update status — making the
separate 'hermes version' subcommand redundant. The subcommand is removed.

- _startup_fast.print_fast_version_info() is now THE canonical version
  printer: static lines print instantly from stdlib probes, then the
  banner label, install-method resolver, and update check lazy-import
  after the first line is on screen (each degrades gracefully).
- main.py _print_version_info() delegates to it (used by /version in the
  CLI chat surface and the --version flag path); the old duplicate
  implementation is deleted.
- hermes_cli/subcommands/version.py removed; parser wiring, subcommand
  sets, console-engine extraction entry, and tests updated. Hermes
  Console keeps a 'version' command wired to the shared printer.
- Termux fast paths now include update status too (previously
  check_updates=False).
- Docs/i18n, CONTRIBUTING, SECURITY, and nix checks updated to
  'hermes --version'.

website/i18n/zh-Hans/docusaurus-plugin-content-docs/current/reference/cli-commands.md

@@ -78,7 +78,7 @@ hermes [global-options] <command> [subcommand/options]
 | `hermes dashboard` | 启动用于管理配置、API 密钥和会话的 Web 控制台。 |
 | `hermes profile` | 管理 profile——多个隔离的 Hermes 实例。 |
 | `hermes completion` | 打印 shell 补全脚本（bash/zsh/fish）。 |
-| `hermes version` | 显示版本信息。 |
+| `hermes --version` | 显示版本信息。 |
 | `hermes update` | 拉取最新代码并重新安装依赖。`--check` 预览而不安装；`--backup` 在拉取前对 `HERMES_HOME` 进行快照。 |
 | `hermes uninstall` | 从系统中删除 Hermes。 |
 
@@ -1246,7 +1246,7 @@ hermes update [--check] [--backup] [--restart-gateway]
 
 | 命令 | 说明 |
 |---------|-------------|
-| `hermes version` | 打印版本信息。 |
+| `hermes --version` | 打印版本信息。 |
 | `hermes update` | 拉取最新变更并重新安装依赖。 |
 | `hermes uninstall [--full] [--yes]` | 删除 Hermes，可选择删除所有 config/数据。 |