chore: Prepare package-lock

[georgylobko]

Description of changes:
Introduced postinstall script to manually prepare package.json for dependabot's package-lock.json updates. The existing approach runs automatically on lint-staged, but that doesn't help when there are no staged changes. This gives us a direct way to run it.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.90%. Comparing base (93d2336) to head (aa024cc).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #192   +/-   ##
=======================================
  Coverage   98.90%   98.90%           
=======================================
  Files          44       44           
  Lines        1185     1185           
  Branches      319      321    +2     
=======================================
  Hits         1172     1172           
  Misses         12       12           
  Partials        1        1           

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