Merge branch 'cleanup_recipes' into 'master'

Remove a bunch of recipes and convert one to wip

See merge request !375

recipes/demos/glium/recipe.sh

-GIT=https://gitlab.redox-os.org/redox-os/glium.git
-GIT_UPSTREAM=https://github.com/glium/glium.git
-BUILD_DEPENDS=(llvm18 mesa zlib)
-BRANCH=redox
-CARGOFLAGS="--example teapot"
-
-function recipe_build {
-    sysroot="$(realpath ../sysroot)"
-    set -x
-    cargo rustc --target "$TARGET" --release ${CARGOFLAGS} \
-        -- \
-        -L "${sysroot}/lib" \
-        -C link-args="-Wl,-Bstatic $("${PKG_CONFIG}" --libs osmesa) -lz -lstdc++ -lc -lgcc"
-    set +x
-    skip=1
-}
-
-function recipe_stage {
-    dest="$(realpath $1)"
-    mkdir -pv "$dest/bin"
-    cp -v "target/${TARGET}/release/examples/teapot" "$dest/bin/glium"
-    skip=1
-}

recipes/other/keyboard-sfx/recipe.sh

-GIT=https://gitlab.redox-os.org/redox-os/keyboard-sfx.git
-
-function recipe_version {
-    echo "0.0.1"
-    skip=1
-}
-
-function recipe_build {
-    echo "skipping build"
-    skip=1
-}
-
-function recipe_clean {
-    echo "skipping clean"
-    skip=1
-}
-
-function recipe_stage {
-    mkdir -pv "$1/sfx"
-    cp -Rv ./* "$1/sfx"
-    skip=1
-}