Make load dll files as bytes instead of direct use to prevent file locks.

[Creta5164]

This PR prevents the Evaluator from directly using assemblies loaded into memory, and instead loads the dlls compiled by the project into memory bytes and uses them instead.

I've confirmed that the code execution and behavior is identical to the current state of the editor's environment, and any changes to the code or packages in the project are compiled and reflected correctly.

Closes #3

[Creta5164]

~~Meh, I haven't tried contribution twice before, sorry about this :P~~

I resolved this!

[Creta5164]

Hey, @mstevenson, it seems you must having busy day, hopefully this reaches to you so I'll appreciate that you can review this PR if you have time!

[mstevenson]

Hi @Creta5164, thanks for the contribution, and apologies for the delay! I'll merge your PR.