gnu: Add rust-serde-fmt-1.

* gnu/packages/crates-io.scm (rust-serde-fmt-1): New variable.

gnu/packages/crates-io.scm

@@ -35909,6 +35909,29 @@ for the serde framework.")
      "Unstable AST representation used by Serde codegen.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-serde-fmt-1
+  (package
+    (name "rust-serde-fmt")
+    (version "1.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "serde_fmt" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "195sp3zxbdgrnaqxwn9z3pij04fd7yyihnm4fpfc261r5fdacqr9"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-serde" ,rust-serde-1))))
+    (home-page "https://github.com/KodrAus/serde_fmt.git")
+    (synopsis "Write any @code{serde::Serialize} using standard formatting APIs")
+    (description
+     "This package allows one to Write any @code{serde::Serialize} using the
+standard formatting APIs.")
+    (license (list license:asl2.0 license:expat))))
+
 (define-public rust-serde-ini-0.2
   (package
     (name "rust-serde-ini")