fix(lint): exclude untracked .js files and fix unused import

- eslint.config.js: add ignores pattern for src/**/*.js (ESLint 9+ format)
- .eslintignore: added for backward compatibility warning suppression
- Appointments.test.tsx: remove unused Appointment import

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/.eslintignore

@@ -0,0 +1,7 @@
+# Ignore untracked .js files containing JSX (build artifacts)
+src/__tests__/*.js
+src/portal/sections/*.js
+src/portal/*.js
+src/pages/*.js
+src/components/*.js
+src/lib/*.js