replace the old dotfiles with the sakura line rice

The bare $HOME repo is gone. This is now the rice: install.sh, rice-*
scripts in bin/, configs in home/ linked into $HOME, theme templates, st
and the particle wallpaper. Clone to ~/rice and run install.sh.

st/build.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+# st/build.sh - build st from st-flexipatch with the rice's patches and settings.
+#
+#   st/build.sh [--install] [--src DIR]
+#
+# Clones st-flexipatch (pinned below) into ~/.local/src/st-flexipatch, or reuses
+# --src, turns on the patches in st/patches.list, applies st/config.sed to
+# upstream's config.def.h, enables the libraries those patches need in
+# config.mk, and runs make. --install then runs `sudo make install`.
+set -euo pipefail
+
+here="$(cd "$(dirname "$(readlink -f "$0")")" && pwd)"
+repo="https://github.com/bakkeby/st-flexipatch"
+commit="aa56259"   # pinned: bump on purpose, after checking patches.list and config.sed still apply
+src="${ST_SRC:-$HOME/.local/src/st-flexipatch}"
+install=0
+
+while (( $# )); do
+  case "$1" in
+    --install) install=1 ;;
+    --src)     src="${2:?--src needs a directory}"; shift ;;
+    *) echo "usage: st/build.sh [--install] [--src DIR]" >&2; exit 2 ;;
+  esac
+  shift
+done
+
+if [[ ! -d $src/.git ]]; then
+  mkdir -p "$(dirname "$src")"
+  git clone --quiet "$repo" "$src"
+fi
+if [[ $(git -C "$src" rev-parse --is-shallow-repository) == true ]]; then
+  git -C "$src" fetch --quiet --unshallow origin
+fi
+git -C "$src" checkout --quiet --force "$commit"
+
+cd "$src"
+
+# patches.h: upstream defaults with our list switched on.
+enabled=$(sed 's/#.*//' "$here/patches.list" | awk 'NF { print $1 }')
+cp patches.def.h patches.h
+for p in $enabled; do
+  grep -q "^#define ${p}_PATCH " patches.h || { echo "st/build.sh: no patch called ${p}_PATCH" >&2; exit 1; }
+  sed -i "s/^#define ${p}_PATCH 0$/#define ${p}_PATCH 1/" patches.h
+done
+
+# config.h: upstream defaults plus our values and shortcuts.
+sed -f "$here/config.sed" config.def.h > config.h
+
+# config.mk: link the libraries the enabled patches need.
+has() { grep -qx "$1" <<<"$enabled"; }
+has ALPHA     && sed -i -E 's/^#(XRENDER = )/\1/' config.mk
+has LIGATURES && sed -i -E 's/^#(LIGATURES_(C|H|INC|LIBS) = )/\1/' config.mk
+has SIXEL     && sed -i -E 's/^#(SIXEL_(C|LIBS) = )/\1/' config.mk
+
+make clean >/dev/null
+make -j"$(nproc)"
+
+if (( install )); then
+  sudo make install
+fi
+echo "st built in $src"