Implement logging features for decompiler

[doctashay]

This replaces the standard prints in the decompiler with the spdlog equivalent. Work still needs to be done to log the output to a file.

[coveralls]

Pull Request Test Coverage Report for Build 309705042

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 81.536%

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Totals
Change from base Build 307072741:	0.0%
Covered Lines:	14652
Relevant Lines:	17970

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💛 - Coveralls

[doctashay]

Decompiler now logs 99% of output to logs/decompiler.log while the decompiler lets the end user know the decompilation is taking process and this may take a few minutes. I see benefit behind adding these arguments as a CMake debug config, so we can test the decompiler further on Windows without the need of entering long arguments within Powershell. We still need to address long build times within issue #79. After spdlog is integrated project-wide, I hope to focus on this issue.

[water111]

Thanks! There are a few that need tweaks, but other than that it's perfect!