Fix line endings

[pepone]

We should fix all text files to use LF line endings as per:

https://code.visualstudio.com/docs/remote/troubleshooting#_resolving-git-line-ending-issues-in-wsl-resulting-in-many-modified-files

With the current settings, line endings are converted to the platform default on checkout, which causes problems with Visual Studio Code dev containers. If you try to open a local clone on a dev container the bash script used for building will not work because the extra \r

[pepone]

This affects the bash scripts included with IceRpc.Protobuf.Tools NuGet package, because we build the packages on a Windows VM.

@pepone ➜ .../icerpc-csharp/examples/protobuf/Greeter (db44cf29) $ dotnet build
An issue was encountered verifying workloads. For more information, run "dotnet workload update".
MSBuild version 17.8.3+195e7f5a3 for .NET
  Determining projects to restore...
  Restored /workspaces/icerpc-csharp/examples/protobuf/Greeter/Client/Client.csproj (in 9.95 sec).
  Restored /workspaces/icerpc-csharp/examples/protobuf/Greeter/Server/Server.csproj (in 9.95 sec).
/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : /usr/bin/env: ‘bash\r’: No such file or directory [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Client/Client.csproj]
/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : --icerpc-csharp_out: protoc-gen-icerpc-csharp: Plugin failed with status code 127. [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Client/Client.csproj]
/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : /usr/bin/env: ‘bash\r’: No such file or directory [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Server/Server.csproj]
/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : --icerpc-csharp_out: protoc-gen-icerpc-csharp: Plugin failed with status code 127. [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Server/Server.csproj]

Build FAILED.

/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : /usr/bin/env: ‘bash\r’: No such file or directory [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Client/Client.csproj]
/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : --icerpc-csharp_out: protoc-gen-icerpc-csharp: Plugin failed with status code 127. [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Client/Client.csproj]
/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : /usr/bin/env: ‘bash\r’: No such file or directory [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Server/Server.csproj]
/home/vscode/.nuget/packages/icerpc.protobuf.tools/0.2.0.1/build/IceRpc.Protobuf.Tools.targets(39,9): error : --icerpc-csharp_out: protoc-gen-icerpc-csharp: Plugin failed with status code 127. [/workspaces/icerpc-csharp/examples/protobuf/Greeter/Server/Server.csproj]
    0 Warning(s)
    4 Error(s)