chore: add dependabot configuration and CI workflow for tests

.github/dependabot.yml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "npm" 
+    directory: "/" 
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions" 
+    directory: "/.github/workflows" 
+    schedule:
+      interval: "weekly"

.github/workflows/test.yml

@@ -0,0 +1,52 @@
+name: CI-Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                node-version: [18, 20, 22, 24, latest]
+        steps:
+            - uses: actions/checkout@v5
+            - name: Use Node.js ${{ matrix.node-version }}
+              uses: actions/setup-node@v6
+              with:
+                  node-version: ${{ matrix.node-version }}
+            - run: npm install prom-client
+            - run: npm install
+            - run: npm run lint
+            - run: npm test
+            - run: npm run test-types
+
+    codeql:
+        name: CodeQL Analysis
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v5
+            - name: Initialize CodeQL
+              uses: github/codeql-action/init@v4
+              with:
+                  languages: javascript
+            - name: Perform CodeQL Analysis
+              uses: github/codeql-action/analyze@v4
+
+    audit:
+        name: Audit Dependencies
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v5
+            - name: Use Node.js 18
+              uses: actions/setup-node@v6
+              with:
+                node-version: 18
+            - run: npm install
+            - name: Audit Dependencies
+              run: npm audit --audit-level=moderate