Add new pattern aesthetics?

[trevorld]

Should we add any new pattern aesthetics supported by {gridpattern} not yet supported by {ggpattern}? Note we don't necessarily need to add any scales...

• pattern_rot: Used by "pch", "regular_polygon", "rose", and "text" patterns to rotate symbol within pattern

  • rot is parameter used in textGrob() to indicate rotation
  • pattern_angle already used to rotate entire pattern

• pattern_grid: Supported by most "geometry" patterns

  • "hex" and "hex_circle" allow hexagonal layouts

• pattern_res: Supported by "array" patterns

  • Allow user to explicitly set resolution of image-based patterns