chore(github): add PR template

Author: tompsota

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,25 @@
+# What's new
+_Describe the PR shortly_
+
+# PR checklist
+
+## In-app checks:
+- [ ] callbacks are received
+- [ ] dev/prod switch works
+- [ ] `README.md` is updated _(if applicable)_
+- [ ] `expo` plugin is updated _(if applicable)_
+- [ ] `example` app is working
+
+## Pre-release checks:
+
+- [ ] `CHANGELOG.md` is updated
+- [ ] `package.json` version is increased
+
+### To be checked by maintainers:
+
+- [ ] freeRASP logs are received
+- [ ] `sdkVersion` property in logs is correct
+- [ ] `sdkPlatform` property in logs is correct
+
+# Resolved issues
+_list of issues resolved by this PR_