deps: Temporarily use fork for @react-navigation/stack

(Much like we did for @react-navigation/bottom-tabs in c0b17bd.)

To get chrisbobbe/react-navigation@a588dcee9, which I've published
to NPM in @zulip/react-navigation-stack@5.14.10-0.zulip.1.

It cherry-picks react-navigation/react-navigation@5a1987708, which
fixes zulip#5486, as noted there:
  zulip#5486 (comment)

So this fix will become unnecessary when we're on React Navigation
6; that's issue zulip#4936.

Tested the bugfix on my iPhone 13 Pro running iOS 16.1, with and
without "Debug with Chrome". The bug was fixed, and back navigation
worked as expected, both with the swipe gesture and the back button.

Fixes: zulip#5486

package.json

@@ -32,7 +32,7 @@
     "@react-navigation/bottom-tabs": "npm:@zulip/react-navigation-bottom-tabs@5.11.16-0.zulip.1",
     "@react-navigation/material-top-tabs": "^5.2.19",
     "@react-navigation/native": "^5.7.6",
-    "@react-navigation/stack": "^5.9.3",
+    "@react-navigation/stack": "npm:@zulip/react-navigation-stack@5.14.10-0.zulip.1",
     "@sentry/react-native": "^3.1.1",
     "@zulip/shared": "0.0.18",
     "base-64": "^1.0.0",

yarn.lock

@@ -2274,10 +2274,10 @@
   dependencies:
     nanoid "^3.1.15"
 
-"@react-navigation/stack@^5.9.3":
-  version "5.14.9"
-  resolved "https://registry.yarnpkg.com/@react-navigation/stack/-/stack-5.14.9.tgz#49c7b9316e6fb456e9766c901e0d607862f0ea7d"
-  integrity sha512-DuvrT9P+Tz8ezZLQYxORZqOGqO+vEufaxlW1hSLw1knLD4jNxkz8TJDXtfKwaz//9gb43UhTNccNM02vm7iPqQ==
+"@react-navigation/stack@npm:@zulip/react-navigation-stack@5.14.10-0.zulip.1":
+  version "5.14.10-0.zulip.1"
+  resolved "https://registry.yarnpkg.com/@zulip/react-navigation-stack/-/react-navigation-stack-5.14.10-0.zulip.1.tgz#df71b85946c3deac0bbec59e40b349da77a48930"
+  integrity sha512-lZDs1CFSir3HJMhEi4Dy+AlF7o6OLAe9oNB4+c7hVdlYW4WgS0BzRBjN/lgZSWKCdx9KepeoCi6CUXS99tknkA==
   dependencies:
     color "^3.1.3"
     react-native-iphone-x-helper "^1.3.0"