chore: Adds dependabot configuration for Composer and GitHub Actions.

Author: gustavofreze

.github/dependabot.yml

@@ -0,0 +1,31 @@
+version: 2
+
+updates:
+  - package-ecosystem: "composer"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 0
+    labels:
+      - "php"
+      - "security"
+      - "dependencies"
+    groups:
+      php-security:
+        applies-to: security-updates
+        patterns:
+          - "*"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "build"
+    labels:
+      - "dependencies"
+      - "github-actions"
+    groups:
+      github-actions:
+        patterns:
+          - "*"

.github/workflows/codeql.yml

@@ -0,0 +1,35 @@
+name: Security checks
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  schedule:
+    - cron: "0 0 * * *"
+
+permissions:
+  actions: read
+  contents: read
+  security-events: write
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ "php", "actions" ]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Perform CodeQL analysis
+        uses: github/codeql-action/analyze@v4