forgejo: Add pull requests template.

* pull_request_template.md: New file.

Change-Id: Id641d4fe654e7a44e4b13162755cbefe35c749bf

.forgejo/pull_request_template.md

@@ -0,0 +1,56 @@
+---
+name: 'Pull Request'
+about: 'Pull request template'
+title: ''
+ref: ''
+labels:
+---
+<!--
+Below is a checklist for package-related patches.  For details please refer to
+[the manual](https://guix.gnu.org/manual/devel/en/html_node/Submitting-Patches.html)
+
+Common issues in the contribution process are also documented in the
+["Contributing" chapter](https://guix.gnu.org/manual/devel/en/html_node/Contributing.html)
+of the manual.
+
+Tick a box by changing it from [ ] to [x].
+-->
+
+- Built successfully on the following system(s):
+  - [ ] x86_64-linux
+  - [ ] i686-linux
+  - [ ] aarch64-linux
+  - [ ] armhf-linux
+  - [ ] powerpc64le-linux
+  - [ ] riscv64-linux
+  - [ ] x86_64-gnu
+  - [ ] i586-gnu
+
+- Successfully cross-compiled to the following target(s) (this is optional):
+  - [ ] x86_64-linux-gnu
+  - [ ] i686-linux-gnu
+  - [ ] aarch64-linux-gnu
+  - [ ] arm-linux-gnueabihf
+  - [ ] powerpc64le-linux-gnu
+  - [ ] riscv64-linux-gnu
+  - [ ] x86_64-pc-gnu
+  - [ ] i586-pc-gnu
+
+- Link to upstream release notes (if applicable):
+
+- Build status of direct dependents (`./pre-inst-env guix build --keep-going --verbosity=1 --dependents=1 PACKAGE ...`)
+```text
+
+```
+
+- [ ] Fixed errors reported by `guix lint` (`./pre-inst-env guix lint PACKAGE ...`).
+
+- [ ] Verified cryptographic signature provided by upstream.
+
+- [ ] The packages don't use bundled copies of software.
+
+- [ ] Synopsis and description are written confirming to [the guidelines](https://guix.gnu.org/manual/devel/en/html_node/Synopses-and-Descriptions.html).
+
+- [ ] Commit messages follow [the "ChangeLog" style](https://www.gnu.org/prep/standards/html_node/Change-Logs.html).
+
+- [ ] The change doesn't break `guix pull` (`guix pull --url=/path/to/your/checkout --profile=/tmp/guix.master`).