[rush-lib] support users to provide their own assets file for init subspace#5134

jzhang026 wants to merge 4 commits intomicrosoft:mainmicrosoft/rushstack:mainfrom

jzhang026:chore/support-users-to-provide-their-own-assets-file-for-init-subspacejzhang026/rushstack:chore/support-users-to-provide-their-own-assets-file-for-init-subspaceCopy head branch name to clipboard