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/netpbm/netpbm.toml

@@ -0,0 +1,67 @@
+[build]
+type = "makefile"
+
+[build.flags]
+makefile_commands = ["make"]
+makefile_install_commands = [
+    'make pkgdir="$DESTDIR/usr" PKGMANDIR=share/man install-run install-dev',
+    '''echo -e '#!/bin/sh\npamditherbw $@ | pamtopnm\n' > "$DESTDIR/usr/bin/pgmtopbm"''',
+]
+
+[dependencies]
+runtime = [
+    "sh",
+    "libcxx",
+    "libunwind",
+    "jbigkit",
+    "glibc",
+    "libjpeg-turbo",
+    "libpng",
+    "libtiff",
+    "libxml215",
+    "perl",
+    "zlib-ng",
+]
+
+[[manual_sources]]
+files = [
+    "reproducible-man-gzip.patch",
+    "netpbm-security-scripts.patch",
+    "netpbm-security-code.patch",
+    "netpbm-CAN-2005-2471.patch",
+]
+
+[package]
+description = "A toolkit for manipulation of graphic images"
+homepage = "http://netpbm.sourceforge.net/"
+license = [
+    "Artistic-1.0",
+    "GPL-2.0-only",
+    "LGPL-2.0-only",
+    "MIT",
+]
+name = "netpbm"
+version = "10.86.48"
+
+[[source]]
+extract_dir = "$name-$version"
+patches = [
+    "netpbm-CAN-2005-2471.patch",
+    "netpbm-security-code.patch",
+    "netpbm-security-scripts.patch",
+    "reproducible-man-gzip.patch",
+]
+post_extract = [
+    "cp config.mk.in  config.mk",
+    "echo 'CFLAGS_SHLIB = -fPIC' >> config.mk",
+    "echo 'TIFFLIB = libtiff.so' >> config.mk",
+    "echo 'JPEGLIB = libjpeg.so' >> config.mk",
+    "echo 'PNGLIB = libpng.so' >> config.mk",
+    "echo 'ZLIB = libz.so' >> config.mk",
+    "echo 'JBIGLIB = /usr/lib/libjbig.a' >> config.mk",
+    "sed -i 's|misc|share/netpbm|' common.mk",
+    "sed -e 's|/sharedlink|/lib|' -e 's|/staticlink|/lib|' -i lib/Makefile",
+    "sed -i 's|install.manwebmain install.manweb install.man|install.man|' GNUmakefile",
+]
+sha256 = "709a98e871aeae892437274d68833c804dd41a4b8daf8fd978cac2782da4148a"
+url = "https://downloads.sourceforge.net/project/netpbm/super_stable/$version/netpbm-$version.tgz"