BitBag Mailchimp plugin (#1305)

* Add bitbag/mailchimp-plugin/1.2

* Delete install:assets step

* Fix 4 spaces indentation

* Add mailchimp parameters

* Define parameteres via container

bitbag/mailchimp-plugin/1.2/config/routes/bitbag_sylius_mailchimp_plugin.yaml

@@ -0,0 +1,2 @@
+bitbag_sylius_mailchimp_plugin:
+    resource: "@BitBagSyliusMailChimpPlugin/Resources/config/routing.yml"

bitbag/mailchimp-plugin/1.2/manifest.json

@@ -0,0 +1,18 @@
+{
+    "bundles": {
+        "BitBag\\SyliusMailChimpPlugin\\BitBagSyliusMailChimpPlugin": ["all"]
+    },
+    "container": {
+        "mailchimp.api_key": "%env(resolve:MAIL_CHIMP_API_KEY)%",
+        "mailchimp.list_id": "%env(resolve:MAIL_CHIMP_LIST_ID)%",
+        "mailchimp.webhook_secret": "%env(resolve:MAIL_CHIMP_WEBHOOK_SECRET)%"
+    },
+    "copy-from-recipe": {
+        "config/": "%CONFIG_DIR%/"
+    },
+    "env": {
+        "MAIL_CHIMP_API_KEY": "YOUR_KEY",
+        "MAIL_CHIMP_LIST_ID": "YOUR_LIST_ID",
+        "MAIL_CHIMP_WEBHOOK_SECRET": "QUERY_PARAMETER_FOR_UNSUBSCRIBED_WEBHHOOK"
+    }
+}

bitbag/mailchimp-plugin/1.2/post-install.txt

@@ -0,0 +1,20 @@
+<bg=blue;fg=white>              </>
+<bg=blue;fg=white> What's next? </>
+<bg=blue;fg=white>              </>
+
+  * Start using your fresh plugin:
+    1. Include the newsletter in your template:
+        <comment>{% include '@BitBagSyliusMailChimpPlugin/_subscribe.html.twig' %}</>
+    2. Add these javascripts to the layout template that includes your subscription form imported in the previous steps
+       <comment><script src="{{ asset('path/to/jquery.js') }}"></script>
+                <script src="{{ asset('bundles/bitbagsyliusmailchimpplugin/bitbag-mailchimp-plugin-newsletter.js') }}"></script>
+                <script>
+                    $('#footer-newsletter-form').joinNewsletter();
+                </script></>
+
+
+
+  * <fg=blue>Read</> the documentation at <comment>https://https://github.com/BitBagCommerce/SyliusMailChimpPlugin/tree/master/doc</>
+
+If you want to contact us, the best way is to fill the form on our website or send us an e-mail to <comment>hello@bitbag.io</comment> with your question(s).
+  We guarantee that we answer as soon as we can!

bitbag/shipping-export-plugin/1.0/config/packages/bitbag_shipping_export_plugin.yaml

@@ -1,2 +1,3 @@
 imports:
     - { resource: "@BitBagSyliusShippingExportPlugin/Resources/config/config.yml" }
+