Fixed handling of DateTime64 dates on Windows systems

[MrDoe]

• Added launch files for VSCode
• Fixed handling of DateTime64 dates on Windows systems
• Convert Linux timezone to Windows timezone on Windows systems
• removed support for older .NET versions than .NET 8 (don't accept these changes, if you still want to support older .NET versions. I was simply too lazy to install the old Framework versions)
• updated XUnit and .NET Test SDK

[victor-sushko]

Thank you for your PR.

1. The task of configuring ICU for timezones is out of scope of ClickHouseClient library. The package Microsoft.ICU.ICU4C.Runtime is a an application level level dependency. Thus, ClickHouseClient itself should not have a reference to this package;
2. Also, the condition [MSBuild]::IsOSPlatform('Windows') checks an OS of a build machine, not the target runtime;
3. netcoreapp3.1, net6.0, net8.0 are still supported;
4. The actual fix works only if the precision of DateTime64 is 3;
5. Tests don't pass.

For the above reasons, I can't accept your pull request, except for the typo fix.

[MrDoe]

Okay, never mind! Meanwhile I've found more issues with DateTime64 columns, so I switched over using NodaTime for handling dates in my fork, because the .NET functions are faulty when converting DateTimeOffsets before 1970 (I need this for birth dates) from UTC to a time zone with DST. Please take a look at my newest pull request which fixes that issue.