fix(summer): delegate admin, route and key commands and pass all delegate flags through

- delegateCommands() builds every delegate from one table of name,
  description and common-flags hint; toolCommands appends it
- route:list, key:generate, admin:create and admin:reset-password are new
  delegates; the child keeps summer's stdin, so the password prompts work
- migrate:rollback, queue:work and schedule:run lose their hand-written
  flag copies: --plugin, --queue and --once now pass through verbatim
- the command list marks delegates with "(flags pass to the app binary)"
  and the help command prints a Long text with the common flags
- console introduction, setup-and-maintenance and the root README
  describe the passthrough behaviour and the new delegates

docs/console/setup-and-maintenance.md

@@ -65,6 +65,8 @@ Copy the printed value into `SUMMER_APP__KEY`. When you rotate the key, keep the
 
 The default `--addr` listens on every interface. Pass a loopback address during development, and put a reverse proxy in front of the binary in production. The routing options are in [surf](../../modules/surf/README.md).
 
+From the application directory, `summer serve --addr 127.0.0.1:8123` passes the flag through to the built binary.
+
 ## Admin accounts
 
 | Command | Arguments and flags | Purpose |
@@ -79,6 +81,8 @@ The default `--addr` listens on every interface. Pass a loopback address during
 
 Both commands prompt for the password without echoing it. In a script, pipe it on stdin, for example `printf '%s\n' "$ADMIN_PASSWORD" | ./bin/acme admin:create --email admin@example.com --superuser`. The `--password` flag still works but is deprecated and prints a warning, because the value stays in your shell history and is visible in the process list. The admin is described in [cabana](../../modules/cabana/README.md).
 
+From the application directory, `summer admin:create --email admin@example.com --superuser` runs the same command on the built binary, prompt included.
+
 ## Queues and the scheduler
 
 | Command | Arguments and flags | Purpose |