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

release-monthly/README.md

@@ -0,0 +1,51 @@
+# ivuorinen/actions/release-monthly
+
+## Do Monthly Release
+
+### Description
+
+Creates a release for the current month, incrementing patch number if necessary.
+
+### Inputs
+
+| name      | description                                              | required | default |
+| --------- | -------------------------------------------------------- | -------- | ------- |
+| `token`   | <p>GitHub token with permission to create releases.</p>  | `true`   | `""`    |
+| `dry-run` | <p>Run in dry-run mode without creating the release.</p> | `false`  | `false` |
+| `prefix`  | <p>Optional prefix for release tags.</p>                 | `false`  | `""`    |
+
+### Outputs
+
+| name           | description                           |
+| -------------- | ------------------------------------- |
+| `release-tag`  | <p>The tag of the created release</p> |
+| `release-url`  | <p>The URL of the created release</p> |
+| `previous-tag` | <p>The previous release tag</p>       |
+
+### Runs
+
+This action is a `composite` action.
+
+### Usage
+
+```yaml
+- uses: ivuorinen/actions/release-monthly@main
+  with:
+    token:
+    # GitHub token with permission to create releases.
+    #
+    # Required: true
+    # Default: ""
+
+    dry-run:
+    # Run in dry-run mode without creating the release.
+    #
+    # Required: false
+    # Default: false
+
+    prefix:
+    # Optional prefix for release tags.
+    #
+    # Required: false
+    # Default: ""
+```