[palas]

Description

As pointed out by @silky, the command cardano-node --help gives a very small and confusing output:

Usage: cardano-node run
 

But curiously, writing cardano-node without parameters gives much better output.

Usage: cardano-node run

  Start node of the Cardano blockchain.

Available options:
  --version                Show the cardano-node version
  -h,--help                Show this help text

Run the node
  run                      Run the node.

Miscellaneous commands
  trace-documentation      Generate the trace documentation
  version                  Show the cardano-node version

So this PR changes cardano-node --help to output the same as cardano-node without parameters.

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated. These may include:
  • golden tests
  • property tests
  • roundtrip tests
  • integration tests
    See Runnings tests for more details
• Any changes are noted in the CHANGELOG.md for affected package
• The version bounds in .cabal files are updated
• CI passes. See note on CI. The following CI checks are required:
  • Code is linted with hlint. See .github/workflows/check-hlint.yml to get the hlint version
  • Code is formatted with stylish-haskell. See .github/workflows/stylish-haskell.yml to get the stylish-haskell version
  • Code builds on Linux, MacOS and Windows for ghc-9.6 and ghc-9.12
• Self-reviewed the diff