Add retry when writing to files that can be in use by another process

[Measurity]

Another process might be using files that the publicizer wants to write to. Having a retry mechanic would then improve the UX so user doesn't need to restart the build.

BepInEx.AssemblyPublicizer.MSBuild.props(17,9): Error MSB4018 : The "PublicizeTask" task failed unexpectedly.
System.IO.IOException: The process cannot access the file '.../publicized/Assembly-CSharp.dll' because it is being used by another process.
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Init(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Int64& fileLength, UnixFileMode& filePermissions)
   at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, UnixFileMode openPermissions, Int64& fileLength, UnixFileMode& filePermissions, Boolean failForSymlink, Boolean& wasSymlink, Func`4 createOpenException)
   at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize, Nullable`1 unixCreateMode)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, Int64 preallocationSize)
   at System.IO.File.Create(String path)
   at BepInEx.AssemblyPublicizer.FatalAsmResolver.FatalWrite(ModuleDefinition module, String filePath)
   at BepInEx.AssemblyPublicizer.AssemblyPublicizer.Publicize(String assemblyPath, String outputPath, AssemblyPublicizerOptions options)
   at BepInEx.AssemblyPublicizer.MSBuild.PublicizeTask.Execute() in /home/runner/work/BepInEx.AssemblyPublicizer/BepInEx.AssemblyPublicizer/BepInEx.AssemblyPublicizer.MSBuild/PublicizeTask.cs:line 116
   at Microsoft.Build.BackEnd.TaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(TaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask)