Update README as package no longer on CRAN

ChangeLog

@@ -1,3 +1,7 @@
+2023-08-22  Dirk Eddelbuettel  <edd@debian.org>
+
+	* README.md: Update README for 'no-longer-on-CRAN'
+
 2023-01-07  Dirk Eddelbuettel  <edd@debian.org>
 
 	* DESCRIPTION (Version, Date): Release 0.0.18

README.md

@@ -2,8 +2,8 @@
 
 [![CI](https://github.com/eddelbuettel/rvowpalwabbit/workflows/ci/badge.svg)](https://github.com/eddelbuettel/rvowpalwabbit/actions?query=workflow%3Aci)
 [![License](https://img.shields.io/badge/license-GPL%20%28%3E=%202%29-brightgreen.svg?style=flat)](https://www.gnu.org/licenses/gpl-2.0.html) 
-[![CRAN](https://www.r-pkg.org/badges/version/RVowpalWabbit)](https://cran.r-project.org/package=RVowpalWabbit) 
-[![Downloads](https://cranlogs.r-pkg.org/badges/RVowpalWabbit?color=brightgreen)](https://www.r-pkg.org/pkg/RVowpalWabbit)
+<!-- [![CRAN](https://www.r-pkg.org/badges/version/RVowpalWabbit)](https://cran.r-project.org/package=RVowpalWabbit)  -->
+<!-- [![Downloads](https://cranlogs.r-pkg.org/badges/RVowpalWabbit?color=brightgreen)](https://www.r-pkg.org/pkg/RVowpalWabbit) -->
 [![Last Commit](https://img.shields.io/github/last-commit/eddelbuettel/rvowpalwabbit)](https://github.com/eddelbuettel/rvowpalwabbit)
 
 ### About
@@ -15,8 +15,13 @@ A proof-of-concept wrapping of (an earlier version of) Vowpal Wabbit
 It works. It could do with some help. And it should be updated now to use the external VowpalWabbit
 library which did not exists when this work was originally done. Collaborators welcome.
 
-It is on CRAN as it works, and sort-of grandfathered. It sadly also reflects
-old code. 
+It was a part of CRAN from Sep 2011 to Aug 2023, sort-of grandfathered, and
+now archived as it also reflects older code and design choices in the
+interface (Boost parse_args as sole input is one, the actual core processing
+is all fine).
+
+It can still be installed easily provided the system requirements
+(i.e. Boost) are met.
 
 A newer attempt is in https://github.com/rvw-org/rvw. And an updated (at
 last) upstream web presence is at https://vowpalwabbit.org.