Prepare CRAN release v0.3.3

- Bump version from 0.3.2.9000 to 0.3.3
- Transfer maintainer role (cre) to Tomasz Kalinowski
- Update author emails to posit.co
- Remove explicit Maintainer field (auto-generated from Authors@R)

Author: dfalbel

.Rbuildignore

@@ -34,3 +34,4 @@
 ^\.positai$
 ^\.claude$
 ^\.codex$
+^CRAN-SUBMISSION$

CRAN-SUBMISSION

@@ -0,0 +1,3 @@
+Version: 0.3.3
+Date: 2026-04-29 15:32:59 UTC
+SHA: 8070dec30c20ed35853106403e95ee58dab1956b

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: cuda.ml
 Type: Package
 Title: R Interface for the RAPIDS cuML Suite of Libraries
-Version: 0.3.2.9000
+Version: 0.3.3
 Authors@R:
     c(person(given = "Yitao",
            family = "Li",
@@ -10,15 +10,14 @@ Authors@R:
            comment = c(ORCID = "0000-0002-1261-905X")),
       person(given = "Tomasz",
              family = "Kalinowski",
-             role = c("cph", "ctb"),
-             email = "tomasz.kalinowski@rstudio.com"),
+             role = c("aut", "cre", "cph"),
+             email = "tomasz@posit.co"),
       person(given = "Daniel",
              family = "Falbel",
-             role = c("aut", "cre", "cph"),
-             email = "daniel@rstudio.com"),
+             role = c("aut", "cph"),
+             email = "daniel@posit.co"),
       person(given = "RStudio",
            role = c("cph", "fnd")))
-Maintainer: Daniel Falbel <daniel@rstudio.com>
 Description: R interface for RAPIDS cuML (<https://github.com/rapidsai/cuml>),
     a suite of GPU-accelerated machine learning libraries powered by CUDA
     (<https://en.wikipedia.org/wiki/CUDA>).