License extension (#1174)

* License menu item should come from an extension #1141

Signed-off-by: Roman <ixrock@gmail.com>

* fix: expose `Util.openExternal` via extensions-api

Signed-off-by: Roman <ixrock@gmail.com>

* move LICENSE back to root

Signed-off-by: Roman <ixrock@gmail.com>

extensions/license-menu-item/main.ts

@@ -0,0 +1,13 @@
+import { LensMainExtension, Util } from "@k8slens/extensions";
+
+export default class LicenseLensMainExtension extends LensMainExtension {
+  appMenus = [
+    {
+      parentId: "help",
+      label: "License",
+      async click() {
+        Util.openExternal("https://k8slens.dev/licenses/eula.md")
+      }
+    }
+  ]
+}