meta: include hacking guidelines in PR template

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -7,14 +7,17 @@ or dependency in this section.
 If your pull request aims to fix an open issue or a please bug, please also link the relevant issue
 below this line. You may attach an issue to your pull request with `Fixes #<issue number>` outside
 this comment, and it will be closed when your pull request is merged.
+
+A developer package template is provided in flake/develop.nix. If working on a module, you may use
+it to test your changes with minimal dependency changes.
 -->
 
 ## Sanity Checking
 
 <!--
 Please check all that apply. As before, this section is not a hard requirement but checklists with more checked
-items are likely to be merged faster. You may save some time in maintainer review by performing self-reviews here
-before submitting your pull request.
+items are likely to be merged faster. You may save some time in maintainer reviews by performing self-reviews
+here before submitting your pull request.
 
 If your pull request includes any change or unexpected behaviour not covered below, please do make sure to include
 it above in your description.
@@ -22,9 +25,11 @@ it above in your description.
 
 [editorconfig]: https://editorconfig.org
 [changelog]: https://github.com/NotAShelf/nvf/tree/main/docs/release-notes
+[hacking nvf]: https://notashelf.github.io/nvf/index.xhtml#sec-guidelines
 
 - [ ] I have updated the [changelog] as per my changes
 - [ ] I have tested, and self-reviewed my code
+- [ ] My changes fit guidelines found in [hacking nvf]
 - Style and consistency
   - [ ] I ran **Alejandra** to format my code (`nix fmt`)
   - [ ] My code conforms to the [editorconfig] configuration of the project
@@ -34,9 +39,10 @@ it above in your description.
   - [ ] I have added a section in the manual
   - [ ] _(For breaking changes)_ I have included a migration guide
 - Package(s) built:
-  - [ ] `.#nix` (default package)
+  - [ ] `.#nix` _(default package)_
   - [ ] `.#maximal`
-  - [ ] `.#docs-html` (manual, must build)
+  - [ ] `.#docs-html` _(manual, must build)_
+  - [ ] `.#docs-linkcheck` _(optional, please build if adding links)_
 - Tested on platform(s)
   - [ ] `x86_64-linux`
   - [ ] `aarch64-linux`
@@ -46,7 +52,8 @@ it above in your description.
 <!--
 If your changes touch upon a portion of the codebase that you do not understand well, please make sure to consult
 the maintainers on your changes. In most cases, making an issue before creating your PR will help you avoid duplicate
-efforts in the long run.
+efforts in the long run. `git blame` might help you find out who is the "author" or the "maintainer" of a current
+module by showing who worked on it the most.
 -->
 
 ---