Add clipboard common module

[asportnoy]

All methods on DiscordNative.clipboard, no webpack searching required. Mainly just need to get typedefs for it.

[colin273]

We should just expand the typedef for DiscordNative instead of shoehorning it into common (which is meant for webpack modules).

[asportnoy]

I don't think those 2 things are mutually exclusive. We can improve the DiscordNative typedefs but I think it would benefit from being in common for convenience and discoverability.