[Tech] Patch @types/node to restrict our platform type to valid platforms

[CommandMC]

process.platform can, under normal circumstances, only ever be win32, darwin, or linux. @types/node can't know this however, so we have to patch it to only make those values possible literal options

Technically this is incorrect (we could have someone run a development version of Heroic on any other platform), but this makes it easier to do checks on the property, or to use it in a switch case / index a Record with it
Somewhat improves the situation of #3908

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)

[flavioislima]

LGTM