Figure.directional_rose: Add parameter 'upright_labels' to force readable labels for rotated projections

[seisman]

Description of proposed changes

Implement the -Td+F. The official documentation says:

+f[level] to get a “fancy” rose, and optionally specify the level of fanciness. Level 1 draws the two principal E-W, N-S orientations, 2 adds the two intermediate NW-SE and NE-SW orientations, while 3 adds the four minor orientations WNW-ESE, NNW-SSE, NNE-SSW, and ENE-WSW [default is 1]. Use +F to force the labels to be readable from the south if the projection has extensive rotation of the directions.

In this PR, I choose to use upright_labels for the parameter name.

Related to #4302.

Examples:

import pygmt
fig = pygmt.Figure()
fig.basemap(region=[-180, 180, 60, 90], projection="S0/90/6c", frame=True)
fig.directional_rose(position="TC", width=2, fancy=1, labels=True)
fig.shift_origin(xshift="w+1")
fig.basemap(region=[-180, 180, 60, 90], projection="S0/90/6c", frame=True)
fig.directional_rose(
    position="TC", width=2, fancy=1, labels=True, upright_labels=True
)
fig.show()