gnu: Add emacs-citar-org-roam.

* gnu/packages/emacs-xyz.scm (emacs-citar-org-roam): New variable.

Signed-off-by: Andrew Tropin <andrew@trop.in>

gnu/packages/emacs-xyz.scm

@@ -19005,6 +19005,36 @@ With Embark, it also makes available at-point actions in Org
 citations.")
     (license license:gpl3+)))
 
+(define-public emacs-citar-org-roam
+  (package
+    (name "emacs-citar-org-roam")
+    (version "0.3")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/emacs-citar/citar-org-roam")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1ldfs7g7ixnrwj23draiph4vy6xq7qgw18vhi7vbw6wvkh9fcv9r"))))
+    (build-system emacs-build-system)
+    (propagated-inputs (list emacs-org-roam emacs-citar))
+    (home-page "https://github.com/emacs-citar/citar-org-roam")
+    (synopsis "Emacs pacakge to provide tighter Citar and Org-Roam integration")
+    (description "\
+Out-of-box, Citar provides default support for file-per-note bibliographic
+notes that are compatible with Org-Roam v2.  This package integrates directly
+with the Org-Roam database, and provides the following additional features to
+Citar note support:
+@itemize
+@item multiple references per note
+@item multiple reference notes per file
+@item ability to query note citations by reference
+@item ``live'' updating of Citar UI for presence of notes
+@end itemize")
+    (license license:gpl3)))
+
 (define-public emacs-helm-bibtex
   (let ((commit "aa775340ba691d2322948bfdc6a88158568a1399")
         (revision "3"))