feat: add GitHub Actions workflows for code quality and automation (#2)

csharp-publish/README.md

@@ -0,0 +1,36 @@
+# ivuorinen/actions/csharp-publish
+
+## C# Publish
+
+### Description
+
+Publishes a C# project to GitHub Packages.
+
+### Inputs
+
+| name             | description                              | required | default     |
+| ---------------- | ---------------------------------------- | -------- | ----------- |
+| `dotnet-version` | <p>Version of .NET SDK to use.</p>       | `false`  | `""`        |
+| `namespace`      | <p>GitHub namespace for the package.</p> | `true`   | `ivuorinen` |
+
+### Runs
+
+This action is a `composite` action.
+
+### Usage
+
+```yaml
+- uses: ivuorinen/actions/csharp-publish@main
+  with:
+    dotnet-version:
+    # Version of .NET SDK to use.
+    #
+    # Required: false
+    # Default: ""
+
+    namespace:
+    # GitHub namespace for the package.
+    #
+    # Required: true
+    # Default: ivuorinen
+```