CLI help (commands, arguments, ...) missing

[gramian]

Issue description

I am missing a listing of available commands, arguments and options for the CLI app. Basically I mean the info that is on the help screen of the CLI.

Updates to existing documentation

I guess this would be a new page? Maybe under Configuration?

Link to Redpanda Slack conversation

https://discord.com/channels/746368194196799589/754099840354615296/1316786815872532532

[rockwotj]

There is some here: https://docs.redpanda.com/current/reference/rpk/rpk-connect/rpk-connect/

But you're right it should be on the connect page too

[gramian]

I was thinking of the CLI help of what used to be or is Benthos, ie:

NAME:
   benthos - A stream processor for mundane tasks - https://benthos.dev/docs

USAGE:
   benthos [global options] command [command options]

DESCRIPTION:
   Either run Benthos as a stream processor or choose a command:

     benthos list inputs
     benthos create kafka//file > ./config.yaml
     benthos run ./config.yaml
     benthos run -r "./production/*.yaml" ./config.yaml

COMMANDS:
   echo      Parse a config file and echo back a normalised version
   lint      Parse Benthos configs and report any linting errors
   run       Run Benthos in normal mode against a specified config file
   streams   Run Benthos in streams mode
   list      List all Benthos component types
   create    Create a new Benthos config
   test      Execute Benthos unit tests
   template  Interact and generate Benthos templates
   blobl     Execute a Benthos mapping on documents consumed via stdin
   help, h   Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --version, -v  display version info, then exit (default: false)
   --help, -h     show help

A use case would be starting a local blobl server, like ./benthos blobl server this or the rpk equivalent is not documented it seems, or did I overlook something in the docs?