feat(diary): boot list, help and completion requests quietly (quick-261028-rqc)

- helpOnly also counts no command word, list, help, cobra's shell
  completion requests and --help=<bool>, read the way pflag does
- TestHelpOnlyAgreesWithCobra pins the classification against bonfire's
  real dispatch, with the passthrough --help case as the exception
- console and logging docs describe which invocations boot quietly

docs/console/introduction.md

@@ -91,8 +91,11 @@ The application binary reads these options before it loads `config/` and starts
 ```sh
 ./bin/acme -vv migrate
 ./bin/acme migrate:status --env staging
+./bin/acme -v serve --help
 ```
 
+An invocation that only lists or describes commands (no command, `list`, `help`, `--help` or `-h`, and shell completion requests) starts the plugins with the console log at warnings, as `-q` would, so the info lines plugins log while they register and boot do not print above the help; `-v` shows them, as in the last line above. `serve`, `queue:work`, `migrate` and every other command boot at the configured levels, and log files keep their levels. It works for both programs and needs no rebuild of the generated `main.go`, only the framework version. A command that passes its arguments through unparsed counts as asking for help when `--help` follows it, but its console log is back at the configured levels before it runs.
+
 ### Exit codes
 
 | Code | Meaning |