feat(steps-guix): add guile-avahi, guile-git, guile-json steps

steps-guix/guile-json-4.7.3/pass1.sh

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+src_prepare() {
+    default
+    autoreconf -fi
+}
+
+src_configure() {
+    local host_triplet pkg_config_path
+    host_triplet="$(gcc -dumpmachine)"
+    pkg_config_path="${LIBDIR}/pkgconfig"
+
+    PATH="${PREFIX}/bin:/usr/bin:/bin" \
+    PKG_CONFIG_LIBDIR="${pkg_config_path}:${PREFIX}/lib/pkgconfig" \
+    PKG_CONFIG_PATH="${pkg_config_path}:${PREFIX}/lib/pkgconfig" \
+    LD_LIBRARY_PATH="${LIBDIR}:${LD_LIBRARY_PATH}" \
+    ./configure \
+        --prefix="${PREFIX}" \
+        --libdir="${LIBDIR}" \
+        --host="${host_triplet}" \
+        --build="${host_triplet}"
+}
+
+src_compile() {
+    default_src_compile
+}
+
+src_install() {
+    default_src_install
+}

steps-guix/guile-json-4.7.3/sources

@@ -0,0 +1 @@
+g https://github.com/aconchillo/guile-json.git~v4.7.3 https://github.com/aconchillo/guile-json/archive/refs/tags/v4.7.3.tar.gz 38ba048ed29d12f05b32c5b2fb7a51795c448b41e403a2b1b72ff0035817f388 guile-json-v4.7.3.tar.gz