Add content for consul (#1488)

* Add content for consul

* Update content/roadmaps/102-devops/content/105-infrastructure-as-code/100-service-mesh/100-consul.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/102-devops/content/105-infrastructure-as-code/100-service-mesh/100-consul.md

@@ -1 +1,6 @@
-# Consul
+# Consul
+
+Consul is a service mesh solution providing a full featured control plane with service discovery, configuration, and segmentation functionality. Each of these features can be used individually as needed, or they can be used together to build a full service mesh. Consul requires a data plane and supports both a proxy and native integration model. Consul ships with a simple built-in proxy so that everything works out of the box, but also supports 3rd party proxy integrations such as Envoy.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Read' href='https://www.consul.io/docs/intro'>What is Consul?</BadgeLink>