Add related apps feature (#3109)

Co-authored-by: Daniel D. Beck <daniel@ddbeck.com>

Author: captainbrosset

features/related-apps.yml

@@ -0,0 +1,8 @@
+name: Related apps
+description: The `related_applications` web app manifest member lists operating system-specific applications that are related to the current web app, such as an Android app that provides similar functionality. The `getInstalledRelatedApps()` method lists which of those are installed on the current device.
+spec: https://wicg.github.io/get-installed-related-apps/spec/
+group: progressive-web-app
+compat_features:
+  - api.Navigator.getInstalledRelatedApps
+  - manifests.webapp.prefer_related_applications
+  - manifests.webapp.related_applications

features/related-apps.yml.dist

@@ -0,0 +1,22 @@
+# Generated from: related-apps.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome_android: "84"
+    edge: "85"
+compat_features:
+  # baseline: false
+  # support:
+  #   chrome: "85"
+  #   chrome_android: "84"
+  #   edge: "85"
+  - api.Navigator.getInstalledRelatedApps
+
+  # baseline: false
+  # support:
+  #   chrome_android: "44"
+  #   edge: "17"
+  - manifests.webapp.prefer_related_applications
+  - manifests.webapp.related_applications