Add PreviewTextWrapMode

[mdgrs-mei]

This PR adds an option to wrap preview text.

I've confirmed that the length calculation is correct and complex characters (Surrogate pairs and Combining characters) are not split in the middle in this test code.

$option = Get-PSRunDefaultSelectorOption
$option.Theme.PreviewTextWrapMode = 'Character'
$option.Theme.Cursor = '👉🏻 ' # 1F449, 1F3FB
$option.Theme.Marker = '🙋‍♂️' # 1F64B, 200D(ZWJ), 2642, FE0F(Variation Selector)
$option.Prompt = 'Can you render these 🤷‍♂️? ' # 1F937, 200D(ZWJ), 2642, FE0F(Variation Selector)
Set-PSRunDefaultSelectorOption $option

'A', '𐓏', '😁', 'á', '👩🏽‍🚒', 'パ', '葛󠄀', '🧑🏻‍💻', '👨‍👩‍👧‍👦' | Invoke-PSRunSelector -Expression {@{
    Name = $_
    Preview = @(
        "A`t0041 - ASCII`tA"
        "𐓏`tD801, DCCF - Surrogate Pair w=1`t𐓏"
        "😁`tD83D, DE01 - Surrogate Pair w=2`t😁"
        "á`t0061, 0301 - Combining Acute Accent w=1`tá"
        "パ`t30CF, 309A - Combining Katakana-Hiragana Semi-Voiced Sound Mark w=2`tパ"
        "葛󠄀`t845B, DB40, DD00 - Variation Selector w=2`t葛󠄀"
        "👩🏽‍🚒`t1F469, 1F3FD, 200D(ZWJ), 1F692 - Combining Character Sequence w=2`t👩🏽‍🚒"
        "🧑🏻‍💻`t1F9D1, 1F3FB, 200D(ZWJ), 1F4BB - Combining Character Sequence w=2`t🧑🏻‍💻"
        "👨‍👨‍👧‍👦`t1F468, 200D(ZWJ), 1F468, 200D(ZWJ), 1F467, 200D(ZWJ), 1F466 - Combining Character Sequence w=2`t👨‍👨‍👧‍👦"
    )
}} -MultiSelection

[mdgrs-mei]

Solves #95