Ghidra analysis backend support

[ex0dus-0x]

Let's get Ghidra implemented as an analysis backend! This will involve basically adopting the scaffolding that already exists in the base class here:

https://github.com/ex0dus-0x/fuzzable/blob/main/fuzzable/analysis/init.py#L39

And ensuring that each method per metric is supported appropriately.

We'll also want to add tests here.