docs(shopify): migrate setup to CLI; add feature flag + Rails console steps

[OlivierGuntenaar]

Summary

Updates the self-hosted Shopify integration docs to reflect Shopify’s CLI-managed app configuration, clarifies visibility conditions, and adds concrete steps to enable the feature in Chatwoot.

Why

Shopify migrated app configuration from the Partner Dashboard to CLI-managed config (config-as-code). The existing doc showed outdated dashboard steps. The new flow aligns with current Shopify guidance and reduces setup confusion.

• Reference: Use CLI-managed app configuration

What changed

• Rewrote setup to use Shopify CLI (create or link via shopify app init).
• Added shopify.app.toml example with placeholders and required callback.
• Added deploy step (shopify app deploy).
• Moved “find Client ID/Secret” to after deploy (for CLI-created apps).
• Kept app creation screenshot; removed outdated dashboard configuration screenshots.
• Added instructions to set SHOPIFY_CLIENT_ID and SHOPIFY_CLIENT_SECRET in Super Admin.
• Added FRONTEND_URL requirement and service restart note.
• Added visibility requirement: enable shopify_integration via Rails console, with snippet to open the console and find Account.first.id.

Affected doc

• self-hosted/configuration/features/integrations/shopify-integration-setup.mdx

How to test

1. Create or link a Shopify app:
   • Create in Partner Dashboard or via CLI.
   • Initialize locally with shopify app init.
2. Edit shopify.app.toml:
   • Set application_url and auth.redirect_urls to your Chatwoot domain and <domain>/shopify/callback.
3. Deploy:
   • shopify app deploy
   • Then retrieve Client ID/Secret in Dev Dashboard: https://dev.shopify.com/dashboard → Apps → your app → Settings.
4. In Chatwoot Super Admin → Settings → Shopify:
   • Set SHOPIFY_CLIENT_ID and SHOPIFY_CLIENT_SECRET.
   • Ensure FRONTEND_URL=https://<your-domain> is set at the web process; restart service.
5. Enable feature for your account (Rails console):
   • Account.first.id → account = Account.find(<ID>)
   • account.enable_features!("shopify_integration")
   • Restart service if needed.
6. Verify:
   • Integrations → Shopify tile visible.
   • Click Connect and complete OAuth.

References

• Shopify CLI docs: Shopify CLI
• Shopify config-as-code migration: Use CLI-managed app configuration
• General contributing best practices: Open Source Guides – How to Contribute