feat: add code owner

Author: Benoit382

.github/CODEOWNERS

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+# Note: order is important; the last matching pattern takes the most precedence
+
+# Global rule
+* @BedrockStreaming/monitoring-qa	

.github/PULL_REQUEST_TEMPLATE.md

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+## Why?
+<!-- Explain why you've opened this PR -->
+
+
+## TODO
+- [ ] code is tested
+- [ ] documentation is updated (if needed)

.github/workflows/ci.yml

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+name: Continuous Integration
+on: [push]
+
+jobs:
+  linter:
+    name: Code style
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@master
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: 7.4
+      - run: composer install --prefer-dist --no-interaction
+      - run: vendor/bin/php-cs-fixer fix --ansi --dry-run --using-cache=no --verbose