dots 0.0.1

• Added a NEWS.md file to track changes to the package.
• Creates dots() and dots_points() to create dot density plots and points for dot density plots.
• Creates engine functions for point types from terra, sf, and sp.
• Creates water clipping via clip_water().
• Creates point filtering via filter_pts().
• Adds an intro dot density vignette.
• Adds package logo.
• Adds tests with testthat.
• Adds pkgdown site.
• Adds GitHub Actions to run R CMD check.