Add more examples of nameOverrides to docs

### Question

I'm using the generator against App Store Connect API. I have the namingStrategy set to idiomatic and this produces really fun parameters such as the /v1/apps filter parameter of

```swift
public init(
filter_lbrack_name_rbrack_: [Swift.String]? = nil,
filter_lbrack_bundleId_rbrack_: [Swift.String]? = nil,
filter_lbrack_sku_rbrack_: [Swift.String]? = nil,

```

The API is riddled with filter[_something_] query parameters so I'm not entirely sure if I want to sign up for the endeavor, but, gotta get one rename to work. I am not finding much in the way of documentation here so I could be doing something entirely wrong or simply not supported.
https://github.com/search?q=repo%3Aapple%2Fswift-openapi-generator%20nameOverrides&type=code

This is the only reference I could find showing an example: https://github.com/apple/swift-openapi-generator/blob/0bd6d842f7f25047d024fdb6e2b9b8ce932518c2/Sources/swift-openapi-generator/Documentation.docc/Proposals/SOAR-0013.md?plain=1#L143-L147

So I tried this, but without any success.

```yaml
nameOverrides:
'filter_lbrack_name_rbrack_': 'filterName'
```

Here is an excerpt from the ASC open api spec:

```yaml
/v1/apps:
get:
tags:
- Apps
operationId: apps_getCollection
parameters:
- name: filter[name]
in: query
description: filter by attribute 'name'
schema:
type: array
items:
type: string
style: form
explode: false
required: false
- name: filter[bundleId]
in: query
description: filter by attribute 'bundleId'
schema:
type: array
items:
type: string
style: form
explode: false
required: false
- name: filter[sku]
in: query
description: filter by attribute 'sku'
schema:
type: array
items:
type: string
style: form
explode: false
required: false
```

Start with Sources/swift-openapi-generator/Documentation.docc/Proposals/SOAR-0013.md, especially the existing nameOverrides example, and compare it with the generated filter parameter names described in the issue. Add documentation examples that clarify how to override these names, including the App Store Connect-style filter parameters. Done means a newcomer can understand the supported syntax and apply it to the shown case.

Written by the indexing model from the issue text.