Document relevant user–facing changes introduced with #703

[0x2b3bfa0]

#703

• Fixes Better logging #22 by using winston as a logging library instead of manually monkey–patching and aliasing console.log and console.error to custom identifiers. Running commands on a TTY will print colorized, human readable logs; other scenarios (like piping) will produce machine-readable JSONL like in the gh command-line tool. There is a single exception handler common for all the command-line interface, eliminating all the duplicate code and delegating the exception formatting on the logging library.

• Fixes Unify commands under a single entry point #699 by moving all the separate commands until a single command named cml and setting up aliases for backwards comaptibility.

• Introduces automatic environment variable processing with yargs.env so cml command --long-option=value is equivalent to CML_COMMAND_LONG_OPTION=value cml without any maintenance overhead.

• Introduces plugin support, allowing executables on the PATH to be called as subcommands from the new cml command; e.g. calling cml something will try to find and execute cml-something if it's in your path. As in gh extensions, external commands can't override internal ones under any circumstance.

• Removes the default CMD on our container images (was set to cml-runner for no apparent reason) and sets a smart ENTRYPOINT that interprets unknown commands as cml commands. It didn't make too much sense to favor a tool over the rest and have seven similar ways of checking the installed CML version.

[dacbd]

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