Nonlinear "clipping" by a polygon with a hole

[asinghvi17]

This will be painful to mesh but here goes.

Here's an example. Ignore the ticks, but any geometry below 0 latitude should not be shown. This PR will ensure that.
Consider the following:

	
fig = Figure(size=(1500, 1500))

settings = "+proj=leac +lat_1=45.0 +ellps=sphere "

ga = GeoAxis(
	fig[1, 1];
	dest=settings,
	title=settings,
)
lines!(ga, GeoMakie.coastlines())
ylims!(ga, 0, 90)
fig

[asinghvi17]

This is priority after #261, #245 and #260