Investigate FastCloner as DeepCloner replacement

- Replace Force.DeepCloner with FastCloner v3.4.4 (source imported)
- Add Update-FastCloner.ps1 script for source import automation
- Update ObjectExtensions.DeepClone to use FastClonerGenerator
- Add nullable annotations to DeepClone extension method
- Replace #if MODERN with #if true // MODERN for .NET 8+ targets
- Add benchmark comparison results

Benchmark results show FastCloner is 7-149% slower than DeepCloner
for our test cases, contrary to published benchmarks.

reduce to fastcloner vs deepcloner

internals

rebase

use generated fastcloner code

group benchmarks, simplify position tracking

work on perf

remove experiment

return original DeepCloner into source code until we sort this out for reproducible benchmarks

remove behaviors, add licenses

sync fastcloner

clean up, sync fastcloner 3.5.1

Update src/Foundatio/Foundatio.csproj

fix

Co-Authored-By: Blake Niemyjski <bniemyjski@gmail.com>

Author: niemyjski