Pydantic 2, better cli, docker-compose

[mike-pisman]

📑 Description

This pull request include several updated

• The project has been reconfigured to support new Pydantic 2.4 version, which involved a few changes like adding new module pydantic-settings. This also allowed bumping the version of other dependencies like beanie, fastapi, and others.
• The cli entry point has changed. Now to run the application, it's require to specify a run command.
  Example: unipoll-api run --host=0.0.0.0 --reload. Each command has it own help, for example, to get help with run command you can run unipoll-api run --help.
  The available commands:
  • unipoll-api run - will run the server, it accepts all the old optional arguments(host, port, reload)
  • unipoll-api setup - is the new command which interactively asks user for input to setup the application and save it to .env file
  • unipoll-api get-openapi - generates an OpenAPI JSON schema and saves it in the openapi.json file. This will be convenient later for use with postman CI action.
• A docker-compose.yaml was added. Using docker compose, the user can create a stack of a MongoDB server and the API application.