Feat: add {sf} interface as alternative to providing coords arg, XY columns #116
Description
Provide an alternative interface with {sf} using a geometry column.
- get_geometry function (Feat/get_geometry #117)
- Internal calc_direction function (Feat/calc direction #122)
- Internal calc_distance function (Feat/calc distance #123)
- Internal calc_centroid function (Feat/calc centroid #124)
- Use calc_direction throughout (Feat/use calc direction #125)
- Use calc_distance throughout (Feat/use calc distance #128)
- Use calc_centroid throughout (Feat/use calc centroid #127)
- Deprecate "projection" arg for "crs" for consistency with sf (Fix/deprecate projection argument for crs #118)
- Resolves Unprojected distance? #16 and Enhancement/use geodist for unprojected coordinates #26
- Partially resolves Fix: Use data.table's env argument #95
- Vignette for new geometry interface (Vignette/new geometry interface #119)
- Reorg checks, fix any impacted tests (Fix/checks and tests before new spatial interface #120)