feat(ORC-8134): add deprecation for ORMContext

[ganzyukv]

Added

• trigger_error() call was added to ORMContext constructor to notify about deprecation at runtime.
• Documentation updated to reflect this change and provide migration path.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.91%. Comparing base (c4afc0e) to head (8f2abca).
Report is 4 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop      #45      +/-   ##
=============================================
+ Coverage      85.66%   85.91%   +0.24%     
  Complexity        85       85              
=============================================
  Files              6        6              
  Lines            286      291       +5     
=============================================
+ Hits             245      250       +5     
  Misses            41       41              

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