feat: Add ability to fetch profile data via additional fields

Resolves #53 (closed)

This MR includes the following changes:

• Adds ability to fetch users via username or gh handle with toggle for public/private data
• Adds caching for Profile-api calls
• Adds missing default configs for projects-service
• Adds testing and mock profile data

These changes were tested locally through integration with the Git-Eca-rest-api