Some General Code Quality Improvements

[Intancote]

Made some changes that just generally improves the quality of the code. This might not really increase or decrease performance of the installer or anything, but just makes the code more nicer to look at.

Changes include but are not limited to:

• Added constants
• Made a part in "github_downloader.go" less complex
• Better formatting/linting

There were parts of the code I wanted to change, but since my go knowledge is very minimal, I didn't try them. Hope this is pleasing

(Gonna do the same to only the new stuff in the "webinstaller" branch, WHEN it's finished ofc)

[Vendicated]

none of these changes contribute anything of value

[AAGaming00]

me when i improve code quality by adding newlines to readme