Updated fix for #280 with dependencies

[genotrance]

Original fix ran "before install" before dependencies were installed.

[genotrance]

I don't see why #280 got linked to these unrelated comments. Regardless, this updated fix has a new issue - if you run nimble install on a package in a local directory, it runs before install twice since the execHook() runs in doAction() as well as inside install().

I'm thinking we need to keep track of whether before and after hooks have run already or not. I think this can be done by changing PackageInfo.preHook and postHook into Table[string, bool] but it might be overkill. Suggestions appreciated.

[genotrance]

I've fixed this by moving the pre and post execHook() calls within installFromDir(). This ensures that it works correctly whether installing locally or after download.

Additionally, I prevent the generic execHook() calls in doAction() from running for actionInstall, similar to actionCustom since they are handled elsewhere.

[genotrance]

Build failed in test for issue #428 - not sure how it is related to this change.

[dom96]

Relevant issue: https://forum.nim-lang.org/t/3949 (which we should also fix)

[dom96]

Closing in favour of #482.