docs: add related projects page

[kingthorin]

Summary

• Add a Documentation page for complementary JVM tools, with Java/Kotlin examples pairing Datafaker's Address provider and address-formatter-java
• Wire the page into mkdocs.yml nav and link short ecosystem notes from the README (datafaker-gen, datafaker-native-demo)

[what-the-diff]

PR Summary

• Addition of New Section in README.md
  The README.md file has been updated with a new section titled "RELATED PROJECTS". This section provides links and descriptions of tools that complement Datafaker, such as an Address formatting tool with address-formatter-java, a Command Line Interface (CLI) generator, and a Native image demo.

• Introduction of New Documentation File
  A new documentation, related-projects.md, has been added. This document provides in-depth information about various projects related to Datafaker. It includes an example of address formatting using address-formatter-java, along with how-to guides involving snippets and code examples in both Java and Kotlin languages.

• Navigation Update in mkdocs.yml
  The navigation in the project documentation's outline has been updated by adding a new entry labeled as "Related projects". This ensures easy access to the detailed document about projects related to Datafaker.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.54%. Comparing base (edb06c2) to head (88c6ce2).
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Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1899      +/-   ##
============================================
+ Coverage     92.49%   92.54%   +0.04%     
- Complexity     3570     3571       +1     
============================================
  Files           347      347              
  Lines          7052     7052              
  Branches        675      675              
============================================
+ Hits           6523     6526       +3     
+ Misses          367      365       -2     
+ Partials        162      161       -1     

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