Baseline throughput tests

[bitfaster]

trafficstars

Make this scriptable, so that an unattended machine can:

• check out main
• Run sizeexec.bat
• Run baseline.bat
• checkout branch x
• Run sizeexec.bat
• Run compare.bat

Compare.bat will then generate charts compare each algorithm for each cache size, similar to https://github.com/bitfaster/BitFaster.Caching/pull/271.

It would also be useful to have a flags enum to control which caches to test, e.g. run this only for LFU.