No documentation for IndexFaker

### Bogus NuGet Package

35.6.3

### .NET Version

Net 9.0

### Visual Studio Version

17.14.7

### What operating system are you using?

Windows

### What locale are you using with Bogus?

en_US

### Problem Description

Searching for `IndexFaker` on the main page of the readme.md brings up no results. a junior dev found it somehow and put it in a PR. I then did a google search for `bogus faker IndexFaker` and found this blog: https://juldhais.net/generating-random-dummy-data-using-bogus-e1f57eecf90b, which shows it's usage.

### LINQPad Example or Reproduction Steps

no repro needed

### Expected Behavior

important features like this are document

### Actual Behavior

no behaviour identified

### Known Workarounds

_No response_

### Could you help with a pull-request?

No

Start by locating the IndexFaker API and the main readme.md, then compare the existing README coverage with the usage shown in the linked blog post. Done means the README documents IndexFaker clearly enough for a junior developer to discover and use it.

Written by the indexing model from the issue text.