feat: Add a unit test target (jest) to the UI extension and run it in CI (#1192)

- Introduce test targets.
- Adding additional tests.

Related to: https://github.com/harvester/harvester/issues/11892

Signed-off-by: Volker Theile <vtheile@suse.com>

svgTransform.js

@@ -0,0 +1,8 @@
+module.exports = {
+  process() {
+    return { code: 'module.exports = {};' };
+  },
+  getCacheKey() {
+    return 'svgTransform';
+  },
+};