Fix AddNet5Support script to not update C# to C++ translator paths

[konard]

Summary

• Fixed the AddNet5Support script to prevent it from updating C# to C++ translator paths
• The script was using overly broad regex patterns that replaced ALL occurrences of netcoreapp3.0, including CSharpToCppTranslator executable paths
• Made regex patterns more specific to only target <TargetFramework> and <TargetFrameworks> XML elements

Problem

The original script used this pattern:

's/netcoreapp3\.0/netcoreapp3.1/g'

This would incorrectly change:

<Exec Command="..\..\CSharpToCppTranslator\bin\$(Configuration)\netcoreapp3.0\CSharpToCppTranslator.exe" />

To:

<Exec Command="..\..\CSharpToCppTranslator\bin\$(Configuration)\netcoreapp3.1\CSharpToCppTranslator.exe" />

Solution

Now uses specific patterns:

's/<TargetFramework>netcoreapp3\.0<\/TargetFramework>/<TargetFramework>netcoreapp3.1<\/TargetFramework>/g'
's/netcoreapp3\.0\([;<]\)/netcoreapp3.1\1/g' 
's/netcoreapp3\.0<\/TargetFrameworks/netcoreapp3.1<\/TargetFrameworks/g'

This preserves CSharpToCppTranslator paths while properly updating project target frameworks.

Test plan

• Tested with sample .csproj file containing CSharpToCppTranslator references
• Verified that only TargetFramework elements are updated
• Confirmed that CSharpToCppTranslator paths remain unchanged
• Verified script handles multiple target frameworks with semicolon separators

🤖 Generated with Claude Code

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Resolves #5