Add between as a usable operator

[Kastakin]

This PR aims to expose the between() operator present in SQLAlchemy.

While the conjunction of lte and gte operators can suffice when dealing with numerical columns this opens the possibility of using the operator also on textual and date columns with a single operator.

The proposed implementation asks the user to input a list, the first two element are considered the right and left sides of the queried interval. If more than two elements are present they are simply ignored.

[netlify[bot]]

✅ Deploy Preview for fastapi-filter ready!

Name	Link
🔨 Latest commit	a2e98b9e2fca2e407aaa44a3c9ee6916266b7c99
🔍 Latest deploy log	https://app.netlify.com/sites/fastapi-filter/deploys/6613e71a6673e00008eeef0f
😎 Deploy Preview	https://deploy-preview-551--fastapi-filter.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (e0f2fa8) to head (a2e98b9).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #551   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines          193       196    +3     
=========================================
+ Hits           193       196    +3     

Files	Coverage Δ
fastapi_filter/contrib/sqlalchemy/filter.py	100.00% <100.00%> (ø)