Feat: Reactions plugin intergration

[Trochonovitz]

Ticket

#36

Summary

PR adds ready-made integration with the Reactions plugin through a single setting in the admin panel. This functionality enriches responses from endpoints with metadata for saved reactions.

Test Plan

Install the Reactions plugin and enable the integration on the settings page. Then, add reactions to your content and check the Comments endpoint - it should include information about these reactions, as well as metadata and a summary.

[codecov]

Codecov Report

❌ Patch coverage is 98.14815% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.33%. Comparing base (e7c709f) to head (5b6941e).

Files with missing lines	Patch %	Lines
admin/src/utils/functions.ts	33.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #415      +/-   ##
==========================================
+ Coverage   98.40%   99.33%   +0.92%     
==========================================
  Files          40       42       +2     
  Lines        1254     1353      +99     
  Branches      289      316      +27     
==========================================
+ Hits         1234     1344     +110     
+ Misses         20        9      -11     

Flag	Coverage Δ
unittest	99.33% <98.14%> (+0.92%)	⬆️

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