Algorand-only opts for js_transfer function

[temptemp3]

Algorand allows you to specify a note in transactions. It would be nice to transfer tokens on Algorand using the reach stdlib with the option of overriding the reach tag in the note as an Algorand-only option for the js_transfer function.

• https://docs.reach.sh/frontend/#js_transfer
• https://github.com/reach-sh/reach-lang/blob/master/js/stdlib/ts/ALGO.ts#L1159