chore: add pull request template

Author: AnastasiyaHladina

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,27 @@
+<!-- This is a pull request template, you do not need to uncomment or remove the comments, they won't show up in the PR text.
+
+Your Pull Request name should start with one of the following tags
+  feat: Adding a new feature
+  refactor: A code change that doesn't change behavior (it doesn't add anything and doesn't fix anything)
+  fix: For bug fixes that affect the end-user
+  chore: For small tasks
+  docs: For documentation
+  ci: For updating CI configuration
+  test: For adding tests
+  i18n: For updating any translations
+  regression: Issues created/reported/fixed during the development phase. kind of problem that never existed in production and that we don't need to list in a changelog for the end user
+-->
+
+## Proposed changes
+<!--
+  Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request.
+  If it fixes a bug or resolves a feature request, be sure to link to that issue below.
+  This description won't be displayed to our end users in the release notes, so feel free to add as much technical context as needed.
+  If the changes introduced in this pull request must be presented in the release notes, make sure to add a changeset file. Check our guidelines for adding a changeset to your pull request: https://developer.rocket.chat/contribute-to-rocket.chat/modes-of-contribution/participate-in-rocket.chat-development/development-workflow#4.-adding-changeset-to-your-pull-request
+-->
+
+## Issue(s)
+<!-- Link the issues being closed by or related to this PR. For example, you can use #333 if this PR closes issue number 333 -->
+
+## Steps to test or reproduce
+<!-- Mention how you would reproduce the bug if not mentioned on the issue page already. -->