[Feature] API Routes for companies

[ernestoresende]

Umbrella issue for all companies routes

We should have routes for creating, listing and updating companies entities.

• POST /companies route to create a new company #31
• GET /companies/:company_id route to get information about a company #32
• GET /companies/:company_id/employees route to get a listing of company's employees #33
• GET /companies/:company_id/schedulings route to get a listing of company's schedulings #34
• PUT /companies/:company_id route to update information on a company #35
• DELETE /companies/:company_id route to deactivate a company #36

[JoaoAlem]

Hello!

first of all, the companies route now is ready for review 🎉
but i have a question, does we need to use prepared statement?

speaking in security, the prepared statements is a good feature to be added.