Update NuGet Package Format and Surface Errors

[vpatakottu]

Modified our .targets files to use in order to copy the SBOM and sha256 hash into the user's nuget package near the binaries. For scenarios where users append "-windows" to the target framework, we also need to append the as well because NuGet renames the folder to "net8.0-windows7.0" in the nuget package.

These changes also set a ToolTask property that will log any errors from the CLI tool as ToolTask errors, so the messages will be surfaced to Visual Studio's output. There is also extra logic added to create the ManifestDirPath directory if it doesn't exist, minimizing the need for users to create it themselves. This is automatically done by the SBOM API, but is not done by the CLI tool; therefore, this logic was added to the ToolTask.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.69%. Comparing base (22b1991) to head (08be8ee).

Additional details and impacted files

@@                      Coverage Diff                      @@
##           feature/sbom-targets-task     #619      +/-   ##
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+ Coverage                      69.63%   69.69%   +0.05%     
=============================================================
  Files                            277      277              
  Lines                           8636     8653      +17     
  Branches                        1007     1009       +2     
=============================================================
+ Hits                            6014     6031      +17     
  Misses                          2105     2105              
  Partials                         517      517              

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