RangeSelector: Tooltip can't be formatted

### Describe the bug

Currently the tooltip on the RangeSelector always shows and shows the raw value. It's missing the equivalent properties of Slider:
- [ThumbToolTipValueConverter](https://learn.microsoft.com/en-us/uwp/api/windows.ui.xaml.controls.slider.thumbtooltipvalueconverter?view=winrt-26100)
- [IsThumbToolTipEnabled](https://learn.microsoft.com/en-us/uwp/api/windows.ui.xaml.controls.slider.isthumbtooltipenabled?view=winrt-26100)

You don't always want the tooltip, or you want to show for instance percentage, or format/round or add currency to it.

### Steps to reproduce

```text
Create a range selector from 0 to 1, to select percentage.
The tooltip will show 0.xxxx values, instead of formatted percentages.
```

### Expected behavior

Ability to override tooltip or disable tooltip.

### Screenshots

_No response_

### Code Platform

- [ ] UWP
- [X] WinAppSDK / WinUI 3
- [ ] Web Assembly (WASM)
- [ ] Android
- [ ] iOS
- [ ] MacOS
- [ ] Linux / GTK

### Windows Build Number

- [ ] Windows 10 1809 (Build 17763)
- [ ] Windows 10 1903 (Build 18362)
- [ ] Windows 10 1909 (Build 18363)
- [X] Windows 10 2004 (Build 19041)
- [X] Windows 10 20H2 (Build 19042)
- [X] Windows 10 21H1 (Build 19043)
- [X] Windows 10 21H2 (Build 19044)
- [X] Windows 10 22H2 (Build 19045)
- [X] Windows 11 21H2 (Build 22000)
- [ ] Other (specify)

### Other Windows Build number

_No response_

### App minimum and target SDK version

- [ ] Windows 10, version 1809 (Build 17763)
- [ ] Windows 10, version 1903 (Build 18362)
- [ ] Windows 10, version 1909 (Build 18363)
- [X] Windows 10, version 2004 (Build 19041)
- [ ] Windows 10, version 2104 (Build 20348)
- [ ] Windows 11, version 22H2 (Build 22000)
- [ ] Other (specify)

### Other SDK version

_No response_

### Visual Studio Version

_No response_

### Visual Studio Build Number

_No response_

### Device form factor

_No response_

### Additional context

_No response_

### Help us help you

Yes, I'd like to be assigned to work on this item.

RangeSelector のエントリーポイントから始め、Issue で示されている Slider のプロパティ（ThumbToolTipValueConverter と IsThumbToolTipEnabled）と、そのツールチップの動作を比較します。パーセンテージ値または通貨値に対して、書式設定、無効化、オーバーライドがどのように機能すべきかを確認し、その後、範囲選択を壊すことなくツールチップを制御できることを検証します。

索引モデルが issue の本文から書いたものです。