feat: Workflow for testing setup

.github/workflows/self-test-setup-flow.yaml

@@ -0,0 +1,21 @@
+name: Self-tests for setup workflow
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - ".github/workflows/test-setup-flow.yaml"
+      - ".github/workflows/self-test-setup-flow.yaml"
+  pull_request:
+    paths:
+      - ".github/workflows/test-setup-flow.yaml"
+      - ".github/workflows/self-test-setup-flow.yaml"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    uses: ./.github/workflows/test-setup-flow.yaml

.github/workflows/test-setup-flow.yaml

@@ -0,0 +1,49 @@
+name: Test setup flow
+on:
+  workflow_call:
+
+jobs:
+  linux:
+    strategy:
+      fail-fast: false
+      matrix:
+        host:
+          - ubuntu-24.04
+          # - ubuntu-24.04-arm
+        distro:
+          - ubuntu:22.04
+          - ubuntu:24.04
+          - ubuntu:25.04
+          - ubuntu:25.10
+          - debian:stable
+          - debian:testing
+          - fedora:latest
+          - opensuse/leap:latest
+    runs-on: ${{ matrix.host }}
+    container:
+      image: ${{ matrix.distro }}
+    steps:
+      - name: Install bare minimum
+        run: |
+          . /etc/os-release
+          case "${ID} ${ID_LIKE}" in
+            *debian*)
+              apt-get update
+              apt-get -y install make snapd sudo
+              ;;
+            *fedora*)
+              dnf install -y make which snapd sudo
+              ;;
+            *suse*)
+              zypper install -n make snapd sudo
+              ;;
+          esac
+      - uses: actions/checkout@v5
+      - run: make setup-lint
+      - run: make lint
+      - run: make setup-tests
+      - run: make test-fast
+      - run: make setup
+      - run: make lint
+      - run: make test-fast
+      - run: make docs