Update to .NET 8.

[bitbound]

Major Changes:

• Updated all projects to .NET 8.
• Migrated web UI from Blazor Server to Blazor Web App.
• Replaced Identity Razor packages with Blazor components.
• Updated Bootstrap.
• Replaced RewritableStream with AppendableStream for embedding server data in the.
• Replaced Windows .NET Framework installer with a PowerShell script.
  • Both methods of embedding server data was corrupting the EXE, and I couldn't get it working.
• Created docker-compose file with default network config and environment config.
  • This will fix potential issues with forwarded headers, assuming any previous hops are properly configured.
  • DbProvider and connection strings are now configured in environment variables in the compose file.
• Moved the majority of settings in appsettings to the database.
• Got Mac agent working (at least x64).
• Created design-time DbContexts for migrations.
• Fixed issues with DI container in tests.

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Please read the following. Do not delete below this line.

Thank you for your contribution to the Remotely project. It is required that contributors assign copyright to Immense Networks so we retain full ownership of the project.

This makes it easier for other entities to use the software because they only have to deal with one copyright holder. It also gives me assurance that we'll be able to make decisions in the future without gathering and consulting all contributors.

While this may seem odd, many open source maintainers practice this. Here are a couple well-known examples:

• Free Software Foundation: http://www.gnu.org/licenses/why-assign.html
• Microsoft: https://cla.opensource.microsoft.com/

A nice article on the topic can be found here: https://haacked.com/archive/2006/01/26/WhoOwnstheCopyrightforAnOpenSourceProject.aspx/

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You hereby assign copyright in this PR's code to the Remotely project and its copyright holder, Immense Networks, to be licensed under the same terms as the rest of the code. You agree to relinquish any and all copyright interest in the software, to the detriment of your heirs and successors.