Customizing our Pull Request Template (#4762)

Author: CoderDake

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,26 @@
+*Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.*
+
+*List which issues are fixed by this PR. You must list at least one issue.*
+
+## Pre-launch Checklist
+
+- [ ] I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
+- [ ] I read the [Tree Hygiene] wiki page, which explains my responsibilities.
+- [ ] I read the [Flutter Style Guide] _recently_, and have followed its advice.
+- [ ] I signed the [CLA].
+- [ ] I listed at least one issue that this PR fixes in the description above.
+- [ ] I updated/added relevant documentation (doc comments with `///`).
+- [ ] I added new tests to check the change I am making, or there is a reason for not adding tests.
+
+
+![build.yaml badge]
+
+If you need help, consider asking for help on [Discord].
+
+<!-- Links -->
+[Contributor Guide]: https://github.com/flutter/devtools/blob/master/CONTRIBUTING.md
+[Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene
+[Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
+[CLA]: https://cla.developers.google.com/
+[Discord]: https://github.com/flutter/flutter/wiki/Chat
+[build.yaml badge]: https://github.com/flutter/devtools/actions/workflows/build.yaml/badge.svg