Implemented asset matching. Added a local test workflow.

README.md

@@ -1,13 +1,37 @@
-# Setup GitHub Release Action
+# setup-github-release
 
-This GitHub/Gitea Action downloads a release from a specified GitHub repository and adds it to the runners tool cache.
+This GitHub/Gitea Action downloads a tool from a GitHub release based on platform-aware selection rules and adds it to the system PATH.
 
 ## Usage
 
+### Simple (Automatic Selection)
+The action will automatically detect your OS and ARCH and look for a matching archive.
 ```yaml
 - uses: ./
   with:
-    repo-name: 'owner/repo'
-    file-name: 'tool-linux.*'
-    use-regex: 'true'
+    repo-name: 'gohugoio/hugo'
 ```
+
+### Regex Search
+You can use a regex pattern (prefixed with `~`) to narrow down the asset.
+```yaml
+- uses: ./
+  with:
+    repo-name: 'gohugoio/hugo'
+    file-name: '~hugo_extended'
+```
+
+### Custom File Type
+```yaml
+- uses: ./
+  with:
+    repo-name: 'some/repo'
+    file-type: 'package' # Matches .deb, .rpm, .pkg
+```
+
+## Inputs
+
+- `repo-name` (required): GitHub repository in `owner/repo` format.
+- `file-name` (optional): Literal name or regex pattern (if starts with `~`) to match the asset.
+- `file-type` (optional, default: `archive`): Predefined keywords `archive`, `package`, or a custom regex extension pattern.
+- `token` (optional): GitHub token for authentication.