chore: Add psalm CI workflow

Signed-off-by: Côme Chilliet <[email protected]>

.github/workflows/psalm.yml

@@ -0,0 +1,41 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+
+name: Static analysis
+
+on: pull_request
+
+concurrency:
+  group: psalm-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  static-analysis:
+    runs-on: ubuntu-latest
+
+    name: static-psalm-analysis
+    steps:
+      - name: Checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Get php version
+        id: versions
+        uses: icewind1991/nextcloud-version-matrix@7d433286e92318f51ed0537b6c77374759e12f46 # v1.3.0
+
+      - name: Set up php${{ steps.versions.outputs.php-available }}
+        uses: shivammathur/setup-php@6d7209f44a25a59e904b1ee9f3b0c33ab2cd888d # v2
+        with:
+          php-version: ${{ steps.versions.outputs.php-available }}
+          extensions: bz2, ctype, curl, dom, fileinfo, gd, iconv, intl, json, libxml, mbstring, openssl, pcntl, posix, session, simplexml, xmlreader, xmlwriter, zip, zlib, sqlite, pdo_sqlite
+          coverage: none
+          ini-file: development
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install dependencies
+        run: composer i
+
+      - name: Run coding standards check
+        run: composer run psalm