CLI usage docs reference removed `hello` command

[joshconner]

Description of the problem

The CLI Usage page (docs/cli/usage.md in ExpressionEngine-User-Guide) uses the hello command as its primary example, but that command is not registered in current ExpressionEngine releases.

Following the docs on a standard EE 7.4.11 install fails immediately:

php system/ee/eecli.php hello
# Command not found. Try `php eecli.php list` for full list of commands.

The page also shows hello in the sample list output and in the --help example, none of which match a real install.

I verified against ExpressionEngine core tags:

• system/ee/ExpressionEngine/Cli/Commands/CommandHelloWorld.php exists in EE 6.0.1
• It is absent from EE 6.0.6, 6.4.17, 7.0.0, and 7.4.11

Suggested fix: replace hello examples with real built-in commands (e.g. list, cache:clear -h) and update the sample list table to match actual output. Interactive/confirmation examples could move to Creating a Command or note that those flags apply to custom commands.

Error Messages

$ php system/ee/eecli.php hello
Command not found. Try `php eecli.php list` for full list of commands.

Additional context

• Source file: https://github.com/ExpressionEngine/ExpressionEngine-User-Guide/blob/7.dev/docs/cli/usage.md
• Tested on EE 7.4.11 after fixing a local CLI bootstrap issue (DB_HOSTNAME=127.0.0.1); php system/ee/eecli.php list works, hello does not.
• Happy to submit a PR updating docs/cli/usage.md if helpful.