Upgrade project files to SDK-style format compatible with dotnet

[peterjamesnugent]

Issues addressed by this PR

Closes #354

• The project files were still using the legacy .NET Framework project files and needed to be upgraded to SDK-style format compatible with dotnet.
• I have not upgraded the framework to netstandard2.0 as I was not confident this would be compatible for this repo and its dependencies.

Test files

• Make sure the solution build with dotnet build
• Run your end of milestone testing procedure

Changelog

Additional comments

[LukeBastianBH]

Successfully built using dotnet build in VS Code. Successfully tested pushing and pulling of Bars, panels, and uniform loads in Rhino 8.

[peterjamesnugent]

@BHoMBot check required

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check core
• check null-handling
• check serialisation
• check versioning
• check installer

There are 9 requests in the queue ahead of you.

[peterjamesnugent]

@BHoMBot check core

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check core

[peterjamesnugent]

@BHoMBot check required

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check core
• check null-handling
• check serialisation
• check versioning
• check installer

[bhombot-ci]

The check core has already been run previously and recorded as a successful check. This check has not been run again at this time.

[peterjamesnugent]

@BHoMBot check compliance

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check branch-compliance
• check dataset-compliance
• check copyright-compliance

There are 12 requests in the queue ahead of you.

[peterjamesnugent]

@BHoMBot check required

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check core
• check null-handling
• check serialisation
• check versioning
• check installer

There are 1 requests in the queue ahead of you.

[bhombot-ci]

The check code-compliance has already been run previously and recorded as a successful check. This check has not been run again at this time.

[bhombot-ci]

The check documentation-compliance has already been run previously and recorded as a successful check. This check has not been run again at this time.

[bhombot-ci]

The check project-compliance has already been run previously and recorded as a successful check. This check has not been run again at this time.

[bhombot-ci]

The check installer has already been run previously and recorded as a successful check. This check has not been run again at this time.

[LukeBastianBH]

Successfully built with dotnet in VS Code and tested some basic push/pull functionality in Rhino 8

[peterjamesnugent]

@BHoMBot check ready-to-merge

[bhombot-ci]

@peterjamesnugent to confirm, the following actions are now queued:

• check ready-to-merge