Add json-schema-merge to tooling page

[x0k]

What kind of change does this PR introduce?

• Adding json-schema-merge to the tools

Issue Number:

• Closes Add json-schema-merge in JSON Schema Ecosystem #2302

[github-actions]

Hi @x0k! Thanks a lot for your contribution!

I noticed that the following required information is missing or incomplete: issue reference

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Thanks a lot!

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (4bd72bb) to head (67abdcf).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #2301   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           30        30           
  Lines          672       672           
  Branches       211       211           
=========================================
  Hits           672       672           

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