Add configuration files and patches for R, SDL2, SDL3, Tk, and Vala

- Introduced `r.toml` for R package configuration, including build flags and dependencies.
- Added `sdl2-compat.toml` for SDL2 compatibility layer with SDL3, specifying build and runtime dependencies.
- Created a patch for SDL3 to handle cases when XInput2 is not available, ensuring compatibility.
- Added `sdl3.toml` for SDL3 configuration, including build flags and dependencies.
- Introduced `tk.toml` for Tk configuration, detailing build flags and runtime dependencies.
- Added a patch for Vala to ensure POSIX compliance in the test runner script, improving portability.

extra/graphviz/graphviz.toml

@@ -0,0 +1,58 @@
+[build]
+type = "autotools"
+
+[build.flags]
+configure = [
+    "--enable-python3=yes",
+    "--disable-python",
+    "--enable-lefty",
+]
+post_install = ['cd "$DESTDIR/usr/lib64/tcl8.6" && rm -fr graphviz && ln -s ../graphviz/tcl graphviz']
+skip_tests = true
+
+[dependencies]
+build = [
+    "swig",
+    "guile",
+    "lua",
+    "perl",
+    "python",
+    "r",
+    "tk",
+]
+optional = [
+    "guile",
+    "lua",
+    "perl",
+    "python",
+    "r",
+    "tcl",
+    "xterm",
+]
+runtime = [
+    "libtool",
+    "pango",
+    "gts",
+    "gsfonts",
+    "libwebp"
+]
+
+[[manual_sources]]
+files = [
+    "postinstall.sh",
+    "postupdate.sh",
+    "preremove.sh",
+]
+
+[package]
+description = "Graph visualization software"
+homepage = "https://www.graphviz.org/"
+license = "EPL-2.0"
+name = "graphviz"
+version = "14.1.4"
+
+[[source]]
+extract_dir = "$name-$version"
+post_extract = ["./autogen.sh NOCONFIG"]
+sha256 = "b32cdb82663f8e19d8cbe3ab5593faa824e0a464d61712727f5c838c3a7ca862"
+url = "https://gitlab.com/graphviz/graphviz/-/archive/$version/$name-$version.tar.gz"