feat: template publishing dialog, stepper, and step components

Rename template marketplace to template publishing throughout:
- Replace useTemplateMarketplaceDialog with useTemplatePublishingDialog
- Update core command from Comfy.ShowTemplateMarketplace to
  Comfy.ShowTemplatePublishing
- Update workflow actions menu label and command reference

Add multi-step publishing dialog infrastructure:
- TemplatePublishingDialog.vue with step-based navigation
- TemplatePublishingStepperNav.vue for step progress indicator
- useTemplatePublishingStepper composable managing step state,
  navigation, and validation
- Step components for each phase: landing, metadata, description,
  preview generation, category/tagging, preview, submission, complete
- StepTemplatePublishingMetadata with form fields for title, category,
  tags, difficulty, and license selection
- StepTemplatePublishingDescription with markdown editor and live
  preview via vue-i18n

Add comprehensive i18n entries for all publishing steps, form labels,
difficulty levels, license types, and category names.

Add tests for dialog lifecycle, stepper navigation/validation, metadata
form interaction, and description editing.

Bump version to 1.42.0.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/templatePublishing/steps/StepTemplatePublishingSubmissionForReview.vue

@@ -0,0 +1,16 @@
+<template>
+  <div class="flex flex-col gap-6 p-6">
+    <h2 class="text-lg font-semibold">
+      {{ t('templatePublishing.steps.submissionForReview.title') }}
+    </h2>
+    <p class="text-muted-foreground">
+      {{ t('templatePublishing.steps.submissionForReview.description') }}
+    </p>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n'
+
+const { t } = useI18n()
+</script>