Add manifest.launch_handler into web-platform-dx features (#2701)

* Add launch handler web-platform feature

* Update app-launch-handler.yml

* Update app-launch-handler.yml.dist

* Apply suggestions from code review

* Update app-launch-handler.yml.dist based on original yml

---------

Co-authored-by: Patrick Brosset <[email protected]>
Co-authored-by: Patrick Brosset <[email protected]>

Author: Dp-Goog

features/app-launch-handler.yml

@@ -0,0 +1,12 @@
+name: Launch handler
+description: The `launch_handler` web app manifest member, with the `client_mode` property, configure how web app launches behave when an instance of the app is already open. For example, you can choose to focus the existing app instance instead of launching a new one.
+spec: https://wicg.github.io/web-app-launch/
+group: progressive-web-app
+compat_features:
+  - api.LaunchParams
+  - api.LaunchParams.targetURL
+  - api.LaunchQueue
+  - api.LaunchQueue.setConsumer
+  - api.Window.launchQueue
+  - html.manifest.launch_handler
+  - html.manifest.launch_handler.client_mode

features/app-launch-handler.yml.dist

@@ -0,0 +1,32 @@
+# Generated from: app-launch-handler.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support:
+    chrome: "110"
+    edge: "110"
+compat_features:
+  # baseline: false
+  # support:
+  #   chrome: "110"
+  #   chrome_android: "110"
+  #   edge: "110"
+  - html.manifest.launch_handler
+  - html.manifest.launch_handler.client_mode
+
+  # baseline: false
+  # support:
+  #   chrome: "102"
+  #   edge: "102"
+  - api.LaunchParams
+  - api.LaunchQueue
+  - api.LaunchQueue.setConsumer
+  - api.Window.launchQueue
+
+  # ⬇️ Same status as overall feature ⬇️
+  # baseline: false
+  # support:
+  #   chrome: "110"
+  #   edge: "110"
+  - api.LaunchParams.targetURL