JSON Schema generator for documentation

[christianhelle]

This pull request includes various changes to the README.md and docs/docfx_project/articles/refitter-file-format.md files to improve documentation and add new settings. The most important changes include updates to command examples, new settings in the .refitter file, and formatting improvements to links.

Documentation updates:

• README.md: Updated command examples to remove the dollar sign prompt and added new settings such as addContentTypeHeaders and dateTimeFormat to the .refitter file examples. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

• docs/docfx_project/articles/refitter-file-format.md: Added new settings such as dateFormat, dateTimeFormat, and addContentTypeHeaders to the .refitter file format documentation. Improved formatting of links to use angle brackets. [1] [2] [3] [4] [5] [6]

Codebase improvement:

• src/Refitter.Core/Settings/ApizrSettings.cs: Added System.ComponentModel and System.Text.Json.Serialization using directives.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.99%. Comparing base (d35f50a) to head (343b579).
Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #623      +/-   ##
==========================================
+ Coverage   95.30%   98.99%   +3.69%     
==========================================
  Files          57       57              
  Lines        2814     2699     -115     
==========================================
- Hits         2682     2672      -10     
+ Misses         99        4      -95     
+ Partials       33       23      -10     

Flag	Coverage Δ
unittests	98.99% <ø> (+3.69%)	⬆️

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