D1/D3: --number canonical on issue wrappers, --labels alias on list wrappers (#1475)

Co-authored-by: marcie <[email protected]>

packages/mosaic/framework/tools/git/issue-assign.sh

@@ -47,7 +47,7 @@ usage_error() {
 # Parse arguments
 while [[ $# -gt 0 ]]; do
     case $1 in
-        -i|--issue)
+        -i|--issue|--number)
             [[ $# -ge 2 && "$2" != - && "$2" != --* && ! "$2" =~ ^-[[:alnum:]] ]] || usage_error "option $1 requires a value (option-like values are rejected; bare - is reserved)"
             ISSUE="$2"
             shift 2