feat(cli): implement cmd/molecule/main.go with full command tree
- Root command: --output, --verbose, --config flags
- Workspace subcommands: create/list/inspect/delete/restart/delegate/audit
- Agent subcommands: list/inspect/send/peers
- Platform subcommands: audit/health
- Config subcommands: list/get/set/init/view
- Exit codes 0/1/2, errors to stderr, text/json/yaml output
- Viper config file support, Gin mode (verbose = debug, silent = release)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Molecule AI SDK Lead
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