r-xla

Add a user-facing nv_* API function to anvl, wrapping primitives with R-idiomatic semantics

Add a new primitive operation to anvl (prim_* function with stablehlo, reverse rules, and tests)

Prepare a release of a single R package. Use when the user says "release this package", "bump version", "cut a release", or wants to publish a new version of the current R package. Must be run from inside the package directory (contains a DESCRIPTION file).

Prepare an R package for a pull request. Use when the user says "prepare pr", "get this ready for review", "run the checks", or wants to finalize changes before opening a PR. Must be run from inside the package directory (contains a DESCRIPTION file).