feat(cli): add --help and --version output

[afurm]

The packaged draftmora command currently starts the server for every invocation. New CLI users should be able to inspect usage and the installed version without starting the app.

Suggested scope:

• Update bin/draftmora.mjs so draftmora --help and draftmora -h print concise usage and exit 0 before importing the server bundle.
• Update draftmora --version and draftmora -v to print the package version and exit 0 before importing the server bundle.
• Keep plain draftmora behavior unchanged.
• Include default ports and the main environment variables in the help text: API_PORT, PORT, WEB_PORT, BOARD_DB_PATH, and OPENAI_API_KEY.

Acceptance criteria:

• node bin/draftmora.mjs --help prints usage and does not start the Fastify server.
• node bin/draftmora.mjs --version prints the current package version.
• The packaged CLI path still starts the app when run without flags.
• Add the smallest practical test or documented verification command.
• npm run typecheck, npm test, and npm pack --dry-run pass.