Add CRAN comments file

.Rbuildignore

@@ -6,6 +6,7 @@
 ^\.github$
 ^\.pre-commit-config\.yaml$
 ^_pkgdown\.yml$
+^cran-comments\.md$
 ^docs$
 ^pkgdown$
 ^rmcmc\.Rproj$

cran-comments.md

@@ -0,0 +1,14 @@
+## R CMD check results
+
+0 errors | 0 warnings | 2 notes
+
+* This is a new release.
+* The package suggests the non-CRAN package 
+  [bridgestan](https://roualdes.github.io/bridgestan/latest/languages/r.html)
+  as an optional dependency. A link to the bridgestan installation instructions
+  is provided in the DESCRIPTION file. Functions using the bridgestan API check
+  for presence of the package using `rlang::check_installed()`, the tests for
+  the related functionality are set to be skipped when running on CRAN and the
+  corresponding examples are only run if bridgestan is installed. bridgestan
+  is installed and the corresponding tests and examples run, as part of the
+  continuous integration runs on the packages GitHub repository.