docs: add a pull request template to standardize PR submissions (#80)

Author: thecoder93

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,44 @@
+<!--
+The Qwik Team and Community appreciate all PRs. Thank you for your effort! Not all PRs can be merged, but those that meet the following criteria will be prioritized:
+
+a) Core fixes, and
+
+b) Framework functionality achievable only by the core.
+
+If this PR can be done as a 3rd-Party Community Add-On, we encourage that for quicker adoption.
+
+If you believe your functionality is valuable to the entire Qwik Community, discuss it in the Qwik Discord channels for potential inclusion in the core.
+
+First of all, make sure your PR title is descriptive and matches our commit title guidelines.
+
+Also make sure your PR follows all the guidelines in the [CONTRIBUTING.md](./CONTRIBUTING.md) document.
+
+-->
+
+# What is it?
+
+<!-- pick one and remove the others -->
+
+- Feature / enhancement
+- Bug
+- Docs / tests / types / typos
+- Infra
+
+# Description
+
+<!--
+* Include a summary of the motivation and context for this PR
+* Is it related to any opened issues? (please add them here)
+-->
+
+# Checklist
+
+<!--
+* delete the items that are not relevant, so it's easy to tell if the PR is ready to be merged
+* add items that are relevant and need to be done before merging
+-->
+
+- [ ] My code follows the [developer guidelines of this project](https://github.com/QwikDev/devtools/blob/main/CONTRIBUTING.md)
+- [ ] I performed a self-review of my own code
+- [ ] I added a changeset with `pnpm change`
+- [ ] I added new tests to cover the fix / functionality