new: migrate even more packages

src/groff/.gitignore

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+.cache/
+dist/
+root/

src/groff/changes.md

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+# 1.23.0
+First version

src/groff/pkg.sh

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+# general info
+NAME="groff"
+DESC="GNU roff"
+VERSION="1.23.0"
+
+# required files
+FILES=("https://ftp.gnu.org/gnu/groff/groff-${VERSION}.tar.gz")
+HASHES=("5e4f40315a22bb8a158748e7d5094c7d")
+
+# install and build depends
+DEPENDS=("gcc-libs" "perl")
+BUILD=()
+
+build(){
+  tar xf "${NAME}-${VERSION}.tar.gz"
+  cd "${NAME}-${VERSION}"
+
+  ./configure --prefix=/usr
+  make
+  make DESTDIR="${ROOTDIR}" install
+
+  cd .. && rm -r "${NAME}-${VERSION}"
+}