rsync: add rsync- prefixes and use aliases

plugins/rsync/rsync.plugin.zsh

-function copy {
-    rsync -av --progress -h "$1" "$2"
-}
-
-function move {
-    rsync -av --progress -h --remove-source-files "$1" "$2"
-}
-
-function update {
-    rsync -avu --progress -h "$1" "$2"
-}
-
-function synchronize {
-    rsync -avu --delete --progress -h "$1" "$2"
-}
+alias rsync-copy="rsync -av --progress -h"
+alias rsync-move="rsync -av --progress -h --remove-source-files"
+alias rsync-update="rsync -avu --progress -h"
+alias rsync-synchronize="rsync -avu --delete --progress -h"