feat: support windows, mac and linux/arm64 runners

this commit adds support for windows, mac and linux arm64 runners.

extend the documentation in the readme to show examples for all
the different runners and document options accordingly.

add a test suite to install quantum-cli in all environments to
confirm it works.

also remove the "undocumented" version parameter since it wasn't
used anyway.

related: pngmbh/issues#2177

Author: till

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    groups:
+      action-deps:
+        patterns:
+          - "*"

.github/workflows/ci.yml

@@ -0,0 +1,42 @@
+name: ci
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            name: Linux (amd64)
+          - os: ubuntu-24.04-arm
+            name: Linux (arm64)
+          - os: macos-13
+            name: macOS (amd64)
+          - os: macos-latest
+            name: macOS (arm64)
+          - os: windows-latest
+            name: Windows (amd64)
+
+    runs-on: ${{ matrix.os }}
+    name: ${{ matrix.name }}
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: ./
+        with:
+          username: "placeholder"
+          password: "placeholder"
+
+      - name: Show version
+        run: quantum-cli -v
+        shell: bash
+
+      - name: Show help
+        run: quantum-cli -h
+        shell: bash