libraqm: add missing fribidi dependency (#36125)

* `libraqm`: add missing `fribidi` dependency
* `libraqm`: add `sheenbidi` variant
* [@spackbot] updating style on behalf of thomas-bouvier

---------

Co-authored-by: thomas-bouvier <thomas-bouvier@users.noreply.github.com>

var/spack/repos/builtin/packages/libraqm/package.py

@@ -15,5 +15,16 @@ class Libraqm(MesonPackage):
 
     version("0.9.0", sha256="9ed6fdf41da6391fc9bf7038662cbe412c330aa6eb22b19704af2258e448107c")
 
+    variant(
+        "bidi_algo",
+        default="fribidi",
+        description="Unicode Bidirectional Algorithm",
+        values=("fribidi", "sheenbidi"),
+        multi=False,
+    )
+
     depends_on("freetype")
     depends_on("harfbuzz")
+
+    depends_on("fribidi@1.0.6:", when="bidi_algo=fribidi")
+    depends_on("sheenbidi@2.6:", when="bidi_algo=sheenbidi")

var/spack/repos/builtin/packages/sheenbidi/package.py

@@ -0,0 +1,17 @@
+# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+
+from spack.package import *
+
+
+class Sheenbidi(MesonPackage):
+    """A sophisticated implementation of Unicode Bidirectional Algorithm"""
+
+    homepage = "https://github.com/Tehreer/SheenBidi"
+    url = "https://github.com/Tehreer/SheenBidi/archive/v2.6.tar.gz"
+    git = "https://github.com/Tehreer/SheenBidi.git"
+
+    version("2.6", sha256="f538f51a7861dd95fb9e3f4ad885f39204b5c670867019b5adb7c4b410c8e0d9")