gnu: Add texlive-cs.

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

gnu/packages/tex.scm

@@ -4081,6 +4081,37 @@ (define-public texlive-babel/fixed
 
 (define-deprecated-package texlive-latex-babel texlive-babel)
 
+(define-public texlive-cs
+  (package
+    (inherit (simple-texlive-package
+              "texlive-cs"
+              (list
+               "fonts/enc/dvips/cs/"
+               "fonts/map/dvips/cs/"
+               "fonts/source/public/cs/"
+               ;; TODO: Remove these pre-built files after the manual
+               ;; build below is fixed.
+               ;; The font fails to build from the Metafont sources, with
+               ;; errors such as:
+               ;; This is METAFONT, Version 2.71828182 (TeX Live 2021/GNU Guix) [...]
+               ;; (./csaccent.mf
+               ;; >> cap_curve#-dot_size#
+               ;; ! Unknown relation will be considered false.
+               ;; <to be read again>
+               "fonts/tfm/cs/cs-a35/"
+               "fonts/tfm/cs/cs-charter/"
+               "fonts/tfm/public/cs/"
+               "fonts/type1/public/cs/"
+               "fonts/vf/cs/cs-a35/")
+              (base32 "1ww5lrqja051fh0ygmfdyy5a6bhwq9k5zv857vwiqf5syvw5djps")
+              #:trivial? #t))
+    (home-page "http://petr.olsak.net/cstex/")
+    (synopsis "Czech/Slovak-tuned Computer Modern fonts")
+    (description "This package provides Czech/Slovak-tuned Computer Modern
+fonts in the Metafont format; Type 1 format versions (csfonts-t1) are also
+available.")
+    (license license:gpl2+)))           ;see fonts/source/public/cs/cscode.mf
+
 ;;; Note: if this package is modified, its name must be changed to comply with
 ;;; its license.
 (define-public texlive-csplain