Add comprehensive CI/CD workflows and tooling

- Add PR validation workflow with lint, format, type check, test, and build steps
- Improve Docker build workflow with caching, security scanning, and manual trigger
- Add CodeQL security analysis workflow
- Add Dependabot configuration for automated dependency updates
- Configure ESLint with TypeScript support
- Add npm scripts for linting and formatting
- Format code with Prettier
- Fix linting issues in source code

Co-authored-by: THoguet <61246905+THoguet@users.noreply.github.com>

.github/workflows/codeql.yml

@@ -0,0 +1,41 @@
+name: CodeQL Security Analysis
+
+on:
+    push:
+        branches: [main]
+    pull_request:
+        branches: [main]
+    schedule:
+        - cron: '0 0 * * 1' # Run every Monday at midnight UTC
+
+jobs:
+    analyze:
+        name: Analyze Code
+        runs-on: ubuntu-latest
+        permissions:
+            security-events: write
+            actions: read
+            contents: read
+
+        strategy:
+            fail-fast: false
+            matrix:
+                language: ['javascript-typescript']
+
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+
+            - name: Initialize CodeQL
+              uses: github/codeql-action/init@v3
+              with:
+                  languages: ${{ matrix.language }}
+                  queries: security-extended,security-and-quality
+
+            - name: Autobuild
+              uses: github/codeql-action/autobuild@v3
+
+            - name: Perform CodeQL Analysis
+              uses: github/codeql-action/analyze@v3
+              with:
+                  category: '/language:${{matrix.language}}'