feat: Add prettier and configure autofix to use it (#6642)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.prettierignore

@@ -0,0 +1,38 @@
+# Dependencies
+node_modules/
+
+# Build output
+dist/
+build/
+
+# Data directories
+data/
+
+# Test output
+test-results/
+playwright-report/
+private/
+
+# Logs
+*.log
+npm-debug.log*
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+
+# Lock files
+package-lock.json
+pnpm-lock.yaml
+yarn.lock
+
+# Generated files
+*.min.js
+*.min.css
+
+# Docker
+docker/