docs: Added Contribution Guideline.

README.md

@@ -75,4 +75,22 @@ Hrefs to such files can be specified as `internal-store-folder/your-file.xsd`.
 
 `hx.xmldoc.toc / action` - one of the [TreeItemActionType](https://github.com/dotnet/docfx/blob/main/src/Docfx.Plugins/TreeItemActionType.cs)
 
-`hx.xmldoc.toc / key` - a TOC item key to apply the action. If the key starts with `~`, then it is used as Href, otherwise as Uid.
+`hx.xmldoc.toc / key` - a TOC item key to apply the action. If the key starts with `~`, then it is used as Href, otherwise as Uid.
+
+## Contribution Guideline
+
+1. [Create a fork](https://github.com/Heleonix/Heleonix.Docfx.Plugins.XmlDoc/fork) from the main repository
+2. Implement whatever is needed
+3. [Create a Pull Request](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request-from-a-fork).
+   Make sure the assigned [Checks](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/collaborating-on-repositories-with-code-quality-features/about-status-checks#checks) pass successfully.
+   You can watch the progress in the [PR: .NET](https://github.com/Heleonix/Heleonix.Docfx.Plugins.XmlDoc/actions/workflows/pr-net.yml) GitHub workflows
+4. [Request review](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/requesting-a-pull-request-review) from the code owner
+5. Once approved, merge your Pull Request via [Squash and merge](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/incorporating-changes-from-a-pull-request/about-pull-request-merges#squash-and-merge-your-commits)
+
+   > [!IMPORTANT]  
+   > While merging, enter a [Conventional Commits](https://www.conventionalcommits.org/) commit message.
+   > This commit message will be used in automatically generated [Github Release Notes](https://github.com/Heleonix/Heleonix.Docfx.Plugins.XmlDoc/releases)
+   > and [NuGet Release Notes](https://www.nuget.org/packages/Heleonix.Docfx.Plugins.XmlDoc/#releasenotes-body-tab)
+
+6. Monitor the [Release: .NET / NuGet](https://github.com/Heleonix/Heleonix.Docfx.Plugins.XmlDoc/actions/workflows/release-net-nuget.yml) GitHub workflow to make sure your changes are delivered successfully
+7. In case of any issues, please contact [[email protected]](mailto:[email protected])