dynamically rename xmlns if different urls shares the same xmlns

[Xiaoy312]

What would you like to be added:

dynamically rename xmlns if different urls shares the same xmlns:

• file1.xaml: xmlns:local="using:Something.This"
• file2.xaml: xmlns:local="using:Something.That"

the rename should cover:

• node name: <local:MyControl />
• certain attribute values:
  • mc:Ignorable
  • [Style or ControlTemplate].TargetType
  • Binding.Path: <TextBlock Text="{Binding Path=(ext:MyExtensions.SomeProperty)}" />

with options to omit/override specific xmlns for edge-case scenarios: (like uno-reserved xmlns: win, not_win, ios, etc...)

[jeromelaban]

For now, the tool marks namespaces as invalid duplicates, which avoids invalid cases where some namespaces could be ignored.

[MatFillion]

this case happened in 3 of the 3 projects who added xaml-merge. (for xmlns specificall)