Added priority for formulas

[KseniaGovorun]

dev

• Project ticket Make it possible to specify the number for the formula and sort by it on the public page (8) #971

Code reviewers

• @loqimean

Summary of issue

Adding the ability to specify the priority of formulas in the calculator designer

Summary of change

CHECK LIST

• СI passed
• Сode coverage >=95%
• PR is reviewed manually again (to make sure you have 100% ready code)
• All reviewers agreed to merge the PR
• PR meets all conventions

Tests for formulas

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.77%. Comparing base (f934abb) to head (3938bf7).

Additional details and impacted files

@@                     Coverage Diff                     @@
##           calculators-constructor     #957      +/-   ##
===========================================================
+ Coverage                    86.74%   86.77%   +0.03%     
===========================================================
  Files                           68       68              
  Lines                         1056     1059       +3     
===========================================================
+ Hits                           916      919       +3     
  Misses                         140      140              

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