chore: add template for new major releases [skip ci] (#2041)

Author: tido64

.github/ISSUE_TEMPLATE/new-major-version.md

@@ -0,0 +1,21 @@
+---
+name: New major release
+about: Umbrella issue for an upcoming major release (for maintainers only)
+title: Breaking changes in X.0
+---
+
+PR: TBD
+Timeline: TBD
+
+### Breaking changes
+
+- [ ] ...
+- [ ] ....
+
+### Post-publish tasks
+
+- [ ] Create the `releases/X.x` branch
+- [ ] Create the `release-X.x` tag
+- [ ] Update [dependencies](https://github.com/microsoft/react-native-test-app/wiki#dependencies)
+- [ ] Update [Patches](https://github.com/microsoft/react-native-test-app/wiki/Patches)
+- [ ] [Announcements](https://github.com/microsoft/react-native-test-app/blob/trunk/CONTRIBUTING.md#release-announcements)

.github/ISSUE_TEMPLATE/new_react-native_version.yml

@@ -1,5 +1,5 @@
 name: "New `react-native` version \U0000269B"
-description: Add support for the latest version of `react-native`
+description: Add support for the latest version of `react-native` (for maintainers only)
 title: "Add support for `react-native` <version>"
 labels: [enhancement]
 body:

.swiftformat

@@ -1,3 +1,3 @@
---swiftversion 5.8
+--swiftversion 5.10
 --ifdef no-indent
 --stripunusedargs closure-only