Add rule documentation

Author: Turbo87

rules/require-task-name-suffix.md

@@ -0,0 +1,28 @@
+# require-task-name-suffix
+
+This rule ensures that the names of all `ember-concurrency` tasks in the app
+end with `Task` to distinguish them from regular methods, actions or other
+properties on the classes.
+
+
+## Examples
+
+This rule **forbids** the following:
+
+```js
+export default Component.extend({
+  submit: task(function*() { 
+    //...
+  }),
+})
+```
+
+This rule **allows** the following:
+
+```js
+export default Component.extend({
+  submitTask: task(function*() {
+    //...
+  }),
+})
+```