[front-end] Change placeholder images for search results

[Dunridge]

In file representative.js and vue component, put a placeholder photo in assets for the development 'representatives' to use. It can be as simple as this, or you can be creative; just make sure the file size is small and fits with the styling already in place!

Copilot prompts

1. What is the schema that is returned for each representative from Cicero
2. How would I change the photoURL to this
3. Refactor to make more robust and include assertions