Imported AI generated TypeScript action skeleton.

README.md

@@ -0,0 +1,19 @@
+# Setup Tool Action
+
+This GitHub/Gitea Action downloads a tool from a specified URL and adds it to the system PATH.
+
+## Usage
+
+```yaml
+- uses: ./
+  with:
+    tool-url: 'https://example.com/tool.tar.gz'
+    tool-name: 'mytool'
+    version: '1.0.0'
+```
+
+## Developing
+
+1. Install dependencies: `npm install`
+2. Build the action: `npm run build`
+3. Test locally: (add tests if needed)