Add cosmic-text recipe

recipes/cosmic-text/.cargo/config

+[patch.crates-io]
+libc = { git = "https://gitlab.redox-os.org/redox-os/liblibc.git", branch = "redox-0.2.136" }

recipes/cosmic-text/recipe.sh

+GIT=https://github.com/pop-os/cosmic-text.git
+BRANCH=main
+
+function recipe_build {
+    sysroot="$(realpath ../sysroot)"
+    set -x
+    cargo build --target "$TARGET" --release --package editor-orbclient
+    set +x
+    skip=1
+}
+
+function recipe_stage {
+    dest="$(realpath $1)"
+    mkdir -pv "$dest/bin"
+    cp -v "target/${TARGET}/release/editor-orbclient" "$dest/bin/cosmic-text"
+    skip=1
+}