Use Uri class from kmp-uri library in JsonSchemaLoader's public API

[OptimumCode]

Resolves #132

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 5 lines in your changes missing coverage. Please review.

Project coverage is 90.76%. Comparing base (e9acf35) to head (623d80d).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...b/optimumcode/json/schema/internal/SchemaLoader.kt	94.33%	1 Missing and 2 partials ⚠️
...github/optimumcode/json/schema/JsonSchemaLoader.kt	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #133   +/-   ##
=======================================
  Coverage   90.76%   90.76%           
=======================================
  Files         124      124           
  Lines        3637     3671   +34     
  Branches     1023     1023           
=======================================
+ Hits         3301     3332   +31     
- Misses         56       59    +3     
  Partials      280      280           

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