export the rule and add docs

Author: broccolinisoup

docs/rules/no-deprecated-props.md

@@ -0,0 +1,48 @@
+## Rule Details
+
+This rule enforces to use the recommended API (`ActionList.GroupHeading`) component over the deprecated prop (`title` prop on `ActionList.Group`) for ActionList component.
+
+👎 Examples of **incorrect** code for this rule:
+
+```jsx
+/* eslint primer-react/no-deprecated-props: "error" */
+import {ActionList} from '@primer/react'
+
+const App = () => (
+  <ActionList>
+    <ActionList.Group title="Group heading">
+      <ActionList.Item>Item 1</ActionList.Item>
+    </ActionList.Group>
+  </ActionList>
+)
+```
+
+👍 Examples of **correct** code for this rule:
+
+```jsx
+/* eslint primer-react/no-deprecated-props: "error" */
+import {ActionList} from '@primer/react'
+
+const App = () => (
+  <ActionList>
+    <ActionList.Group>
+      <ActionList.GroupHeading as="h2">Group heading</ActionList.GroupHeading>
+      <ActionList.Item>Item 1</ActionList.Item>
+    </ActionList.Group>
+  </ActionList>
+)
+```
+
+```jsx
+/* eslint primer-react/no-deprecated-props: "error" */
+import {ActionList} from '@primer/react'
+
+const App = () => (
+  <ActionList role="lisbox">
+    <ActionList.Group>
+      <ActionList.GroupHeading>Group heading</ActionList.GroupHeading>
+      <ActionList.Item>Item 1</ActionList.Item>
+    </ActionList.Group>
+  </ActionList>
+)
+```

src/configs/recommended.js

@@ -17,6 +17,7 @@ module.exports = {
     'primer-react/new-color-css-vars': 'error',
     'primer-react/a11y-explicit-heading': 'error',
     'primer-react/new-color-css-vars-have-fallback': 'error',
+    'primer-react/no-deprecated-props': 'warn',
   },
   settings: {
     github: {

src/index.js

@@ -8,6 +8,7 @@ module.exports = {
     'new-color-css-vars': require('./rules/new-color-css-vars'),
     'a11y-explicit-heading': require('./rules/a11y-explicit-heading'),
     'new-color-css-vars-have-fallback': require('./rules/new-color-css-vars-have-fallback'),
+    'no-deprecated-props': require('./rules/no-deprecated-props'),
   },
   configs: {
     recommended: require('./configs/recommended'),