MAUI: Accepting FontImageSource in InputKit Controls

[sattasundar]

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Controls need to accept FontImageSource to support FontIcons. This will give more flexibility to developer.

e.g.

       <inputKit:AdvancedEntry BorderColor="{DynamicResource AccentColor}"
                                BackgroundColor="Transparent"
                                CornerRadius="10"
                                Placeholder="Username">
            <inputKit:AdvancedEntry.IconImage>
                <FontImageSource FontFamily="IconFontTypes"
                                         Glyph="{x:Static helpers:IconFont.AccountOutline}"
                                         Color="{DynamicResource AccentColor}">
                </FontImageSource>
            </inputKit:AdvancedEntry.IconImage>
        </inputKit:AdvancedEntry>

[enisn]

This is a good option. This feature is missing because I've just migrated from Xamarin Forms.

We can add it to the MAUI implementation 👍

[enisn]

After PR #285, FontIcon can be used in version 4.1.0

4.1 stable hasn't released yet but you can go with 4.1.0-pre.1