Tool auto generated Invoke reflection names are too long

[StephenHodgson]

          @StephenHodgson I've found that Assistant v2 doesn't always understand well when type.FullName is included, because the namespaces I use are long and not relevant/confusing to the AI context.

I found that removing this and only including the method.Name solved it.

I realize it isn't the ideal scenario in case two types contain the same method name, but it would still be helpful with an omit namespace option if possible. For now I've been removing it manually here in each update :)

Originally posted by @Bodekaer in RageAgainstThePixel/com.openai.unity#235 (comment)

Proposed fix:

Converting long namespace names to hash file string guid.