Initial release requirements

[program--]

Core requirements

• Encoding
• Decoding
• Linestring/Polygon-specific encoding/decoding
• Compression
• Decompression
• Unit tests
• sf S3 methods for encoding
• sf S3 methods for decoding
• sf S3 methods for compression
• sf S3 methods for decompression
• Modify C++ unit tests to use testthat infrastructure

Documentation requirements

• Vignettes showing package usage
• Function examples in roxygen2 comments

CI/CD

• Setup automated testing
• Setup pkgdown
• Setup R CMD check