Add NowSecure Mobile SBOM workflow

.github/workflows/nowsecure-mobile-sbom.yml

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+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+#
+# NowSecure: The Mobile Security Experts <https://www.nowsecure.com/>.
+#
+# To use this workflow, you must have a token for NowSecure Platform. If you are a NowSecure customer,
+# you can find it in NowSecure Platform.
+#
+# If you *are not* a NowSecure customer, click here to sign up for a free trial to get access:
+# <https://bit.ly/ns-git-sbom>.
+#
+# Instructions:
+#
+# 1. In the settings for your repository, click "Secrets" then "New repository secret". Name the secret "NS_TOKEN" and
+#    paste in your Platform token. If you do not have a Platform token, or wish to create a new one for GitHub, visit
+#    NowSecure Platform and go to "Profile & Preferences" then create a token labelled "GitHub".
+#
+# 2. Follow the annotated workflow below and make any necessary modifications then save the workflow to your repository
+#    and review the "Dependency graph" tab in the "Insights" pane once the action has run.
+
+name: "NowSecure Mobile SBOM"
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ "main" ]
+  schedule:
+    - cron: '40 16 * * 0'
+
+permissions:
+  contents: read
+
+jobs:
+  nowsecure:
+    name: NowSecure Mobile SBOM
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Build your application
+        run: ./gradlew assembleDebug              # Update this to build your Android or iOS application
+
+      - name: NowSecure upload app
+        uses: nowsecure/nowsecure-sbom-action@ecb731b6f17a83fa53f756f9dae2ec7034c5ed7c
+        with:
+          token: ${{ secrets.NS_TOKEN }}
+          app_file: app-debug.apk                 # Update this to a path to your .ipa or .apk
+          group_id: {{ groupId }}                 # Update this to your desired Platform group ID