Add badges

.github/workflows/psalm.yml

@@ -0,0 +1,34 @@
+name: Psalm
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  psalm:
+    name: Psalm on PHP ${{ matrix.php-versions }}
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      matrix:
+        operating-system: ['ubuntu-latest']
+        php-versions: ['8.1', '8.2', '8.3']
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          tools: psalm:4
+          coverage: none
+
+      - name: Install Composer dependencies
+        uses: "ramsey/composer-install@v1"
+        with:
+          composer-options: --no-dev
+
+      - name: Static Analysis
+        run: psalm

README.md

@@ -1,5 +1,11 @@
 # AWS KMS KeyProvider for CipherSweet (PHP)
 
+[![Static Analysis](https://github.com/paragonie/ciphersweet-provider-aws-kms/actions/workflows/psalm.yml/badge.svg)](https://github.com/paragonie/ciphersweet-provider-aws-kms/actions)
+[![Latest Stable Version](https://poser.pugx.org/paragonie/ciphersweet-provider-aws-kms/v/stable)](https://packagist.org/packages/paragonie/ciphersweet-provider-aws-kms)
+[![Latest Unstable Version](https://poser.pugx.org/paragonie/ciphersweet-provider-aws-kms/v/unstable)](https://packagist.org/packages/paragonie/ciphersweet-provider-aws-kms)
+[![License](https://poser.pugx.org/paragonie/ciphersweet-provider-aws-kms/license)](https://packagist.org/packages/paragonie/ciphersweet-provider-aws-kms)
+[![Downloads](https://img.shields.io/packagist/dt/paragonie/ciphersweet-provider-aws-kms.svg)](https://packagist.org/packages/paragonie/ciphersweet-provider-aws-kms)
+
 This repository exists to provide a distinct Composer package useful for 
 integrating [CipherSweet](https://github.com/paragonie/ciphersweet) with AWS KMS.