feat: Added initial Trimming support.

[HavenDV]

Closes #20

But because preview version of System.Memory.Data does not explicitly support net6.0, this warning appears here

0>System.Text.Encodings.Web.targets(4,5): Warning  : System.Text.Encodings.Web 9.0.0-preview.4.24266.19 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk.
0>Microsoft.Bcl.AsyncInterfaces.targets(4,5): Warning  : Microsoft.Bcl.AsyncInterfaces 9.0.0-preview.4.24266.19 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk.
0>System.Text.Json.targets(4,5): Warning  : System.Text.Json 9.0.0-preview.4.24266.19 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk.
0>System.Memory.Data.targets(4,5): Warning  : System.Memory.Data 9.0.0-preview.4.24266.19 doesn't support net6.0 and has not been tested with it. Consider upgrading your TargetFramework to net8.0 or later. You may also set <SuppressTfmSupportBuildWarnings>true</SuppressTfmSupportBuildWarnings> in the project file to ignore this warning and attempt to run in this unsupported configuration at your own risk.

There are two ways out:

• Ignore, this can work without problems
• Add #ifdef/ MSBuild Conditions to use old behavior for net6 and new for net8/netstandard

I'm waiting for feedback

[KrzysztofCwalina]

Thanks for the contribution! The core fixes look good! I just have a question and a change request I commented inline in the sources.

[jcoc611-microsoft]

@HavenDV @KrzysztofCwalina any chance we could revive this PR and merge it in? would be super useful to get NAOT support (plus source generated JSON parsing would likely be more efficient than reflection)

[KrzysztofCwalina]

@HavenDV @KrzysztofCwalina any chance we could revive this PR and merge it in? would be super useful to get NAOT support (plus source generated JSON parsing would likely be more efficient than reflection)

Once you remove the trimming helper, I can unblock this PR.

[HavenDV]

@HavenDV @KrzysztofCwalina any chance we could revive this PR and merge it in? would be super useful to get NAOT support (plus source generated JSON parsing would likely be more efficient than reflection)

Once you remove the trimming helper, I can unblock this PR.

It has been removed