feat: Artisan checklist for application commands, hints and coverage gate

- migrate, migrate:rollback and deferred:purge gain --pretend and --force;
  they and queue:clear confirm only in production on an interactive
  terminal, so deploys over SSH proceed as before
- result lines: Applied N migrations, Rolled back <id> of <plugin>,
  Cleared N jobs from <queue>
- --json for migrate:status, key:generate, route:list, admin:token:create,
  admin:token:list, admin:token:scopes and websockets:health; -q keeps the
  key and the token
- hints for an empty DSN, an unreachable database, an invalid app.key, a
  missing uploads bucket and an application binary run below its root
- flare and websockets:health return bonfire.Reported after printing
- long help and examples for every application command, greeter:hello and
  blog:publish; cmd/summer TestCommandsDocumented fails on any gap

modules/lagoon/encrypted.go

@@ -14,6 +14,7 @@ import (
 	"sync"
 
 	"git.golem15.com/golem15/summercms/modules/backpack"
+	"git.golem15.com/golem15/summercms/modules/bonfire"
 	"git.golem15.com/golem15/summercms/modules/compass"
 )
 
@@ -343,7 +344,9 @@ func loadEncryptionKeysFromApp(app *backpack.App) error {
 	}
 	primary, previous, err := LoadAppKey(app.Config)
 	if err != nil {
-		return err
+		return bonfire.WithHint(err,
+			"app.key encrypts Encrypted columns; set it in SUMMER_APP__KEY or config/app.yaml.",
+			"{bin} key:generate")
 	}
 	return PublishEncryptionKeys(app, primary, previous)
 }