Add PR template and note to README about said template

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,17 @@
+# Description
+
+This pull request implements xyz or fixes abc.
+
+closes #(issue)
+closes #(another issue)
+
+## Checklist
+
+Please put an x inside each checkbox to indicate that you've read and followed it: `[ ]` -> `[x]`
+
+- [ ] I/we have not leveraged GenAI to create the proposed changes.
+- [ ] I/we have performed a self-review of added code.
+- [ ] I/we have written code that is legible and maintainable by others.
+- [ ] I/we have commented the added code, particularly in hard-to-understand areas.
+- [ ] I/we have made any necessary changes to documentation.
+- [ ] I/we have run `cargo fmt` and `cargo clippy`.

README.md

@@ -100,4 +100,7 @@ work out of the box.
 
 [Unlicense](LICENSE)
 
-tl;dr: public domain
+tl;dr: code is in the public domain
+
+[the PR template](./.github/PULL_REQUEST_TEMPLATE.md) is derived from
+[GoToSocial's PR template](https://codeberg.org/superseriousbusiness/gotosocial/src/branch/main/.gitea/pull_request_template.md)