chore: add help needed auto-comment by label

.github/help-needed.md

@@ -0,0 +1,14 @@
+This issue was marked with the `help needed` label by a maintainer.
+
+The issue might require some digging, so it is recommended to have some experience with the project.
+
+Have a look at the [Contributing Guide](https://github.com/nextauthjs/.github/blob/main/CONTRIBUTING.md) first.
+
+This will help you set up your development environment to get started. When you are ready, open a PR, and link back to this issue in the form of adding `Fixes #1234` to the PR description, where `1234` is the issue number. This will auto-close the issue when the PR gets merged, making it easier for us to keep track of what has been fixed.
+
+Please make sure that - if applicable - you add tests for the changes you make.
+
+If you have any questions, feel free to ask in the comments below or the PR. Generally, you don't need to `@mention` anyone directly, as we will get notified anyway and will respond as soon as we can)
+
+> [!NOTE]  
+> There is no need to ask for permission "can I work on this?" Please, go ahead if there is no linked PR :slightly_smiling_face:

.github/workflows/triage.yml

@@ -20,7 +20,7 @@ jobs:
         with:
           label-area-prefix: ""
           label-area-section: "[Provider|Adapter] type(.*)### Environment"
-          label-comments: '{ "incomplete": ".github/invalid-reproduction.md", "good first issue": ".github/good-first-issue.md" }'
+          label-comments: '{ "incomplete": ".github/invalid-reproduction.md", "good first issue": ".github/good-first-issue.md", "help needed": ".github/help-needed.md" }'
           reproduction-link-section: "### Reproduction URL(.*)### Describe the issue"
           reproduction-invalid-label: "invalid reproduction"
           reproduction-issue-labels: "bug,"