ci: add pipeline for lint and unit tests

.github/actions/setup_helm/action.yaml

@@ -0,0 +1,28 @@
+name: Setup Helm
+
+inputs:
+  helm-version:
+    description: The version of Helm to setup
+    default: v3.12.0
+    required: false
+    type: string
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install Helm
+      uses: azure/setup-helm@v3
+      id: install-helm
+      with:
+         version: ${{ inputs.helm-version }}
+
+    - name: Add and update repos
+      run: |
+        helm repo add bitnami https://charts.bitnami.com/bitnami
+        helm repo add passbolt-library https://download.passbolt.com/charts/passbolt-library
+        helm repo update
+      shell: bash
+
+    - name: Build chart dependencies
+      run: helm dependency build
+      shell: bash

.github/workflows/push_pr_main.yaml

@@ -0,0 +1,40 @@
+name: Push & PR to the main branch
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Helm
+        uses: ./.github/actions/setup_helm
+
+      - name: Run linter
+        run: helm lint
+
+  unit-test:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Helm
+        uses: ./.github/actions/setup_helm
+
+      - name: Install Helm unit test plugin
+        run: helm plugin install https://github.com/helm-unittest/helm-unittest.git
+
+      - name: Run unit tests
+        run: helm unittest .