Coin control

[nickfarrow]

It would be great if there were a way to select specific utxos when spending, bypassing whatever existing coin selection algorithm exists.

Brainstorming some ideas for how this could work

• Pass list of addresses/utxos via a flag --spend-from - perhaps poor UX but also extensible for gun as a cli
• Like above, but instead pass address indexes with a flag - would probably want address list to include an index column so these are accessible. We would also have to make some distinction on internal/external..
• Interactive menu where you can toggle UTXOs - would be nice, but also not very CLI-like (could be built on top of --spend-from)

Other ideas?