docs: add CI badge and eslintignore

- Added CI status badge to README.md
- Created .eslintignore to exclude build artifacts and dependencies
- Badge links to GitHub Actions workflow page

Author: CynaCons

frontend/.eslintignore

@@ -0,0 +1,26 @@
+# Dependencies
+node_modules/
+dist/
+build/
+coverage/
+
+# Build outputs
+*.js
+*.mjs
+!eslint.config.js
+!vite.config.ts
+
+# Test artifacts
+*.log
+.vitest/
+
+# IDE
+.vscode/
+.idea/
+
+# System files
+.DS_Store
+Thumbs.db
+
+# Workers (compiled)
+classifyWorker-*.js