chore: add catalog-info.yaml and LICENSE

LICENSE

@@ -0,0 +1,15 @@
+ISC License
+
+Copyright (c) 2025 LeoPlatform
+
+Permission to use, copy, modify, and/or distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.

catalog-info.yaml

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+apiVersion: backstage.io/v1alpha1
+kind: Component
+metadata:
+  name: "auth-sdk"
+  description: "Leo/RStreams authentication SDK for Node.js applications"
+  annotations:
+    github.com/project-slug: LeoPlatform/auth-sdk
+    backstage.io/techdocs-ref: dir:.
+  tags:
+    - typescript
+    - auth
+    - sdk
+    - nodejs
+spec:
+  type: library
+  lifecycle: production
+  owner: "cup-shared-services"