feat: make company employees searchable 🔎

[ramiAbdou]

Description ✏️

This PR:

• Updates the listCompanyEmployees to accept a search parameter. It also does some extra calculation in the query which sums up the total time someone has spent at the company, then sorts in descending order based off of that.
• Updates the UI of the company employees page:
  • Shows one big list of employees instead of separating current/past.
  • Shows a Current | Past pill for the employee.
  • Shows the time spent at the company.
• Fixes other visual bugs.

Type of Change 🐞

• Feature - A non-breaking change which adds functionality.
• Fix - A non-breaking change which fixes an issue.
• Refactor - A change that neither fixes a bug nor adds a feature.
• Documentation - A change only to in-code or markdown documentation.
• Tests - A change that adds missing unit/integration tests.
• Chore - A change that is likely none of the above.

Checklist ✅

• I have done a self-review of my code.
• I have manually tested my code (if applicable).
• I have added/updated any relevant documentation (if applicable).