gnu: Add texlive-collcell.

* gnu/packages/tex.scm (texlive-collcell): New variable.

gnu/packages/tex.scm

@@ -76466,6 +76466,29 @@ allow preselection based on whether sections of code in a preamble of
 a template are executed.")
     (license license:lppl1.3+)))
 
+(define-public texlive-collcell
+  (package
+    (name "texlive-collcell")
+    (version (number->string %texlive-revision))
+    (source (texlive-origin
+             name version
+             (list "doc/latex/collcell/"
+                   "source/latex/collcell/"
+                   "tex/latex/collcell/")
+             (base32
+              "0nqxqq2vncxvjm1xwnsznsn451ngcqs046f9ldy1c7h6n4dxq3xc")))
+    (outputs '("out" "doc"))
+    (build-system texlive-build-system)
+    (home-page "https://ctan.org/pkg/collcell")
+    (synopsis "Collect contents of a tabular cell as argument to a macro")
+    (description
+     "The package provides macros that collect the content of a tabular cell, and
+offer them as an argument to a macro.  Special care is taken to remove all
+aligning macros inserted by tabular from the cell content.  The macros also
+work in the last column of a table, but do not support verbatim material
+inside the cells.")
+    (license license:lppl1.3+)))
+
 ;;;
 ;;; Avoid adding new packages to the end of this file. To reduce the chances
 ;;; of a merge conflict, place them above by existing packages with similar