get rid of unified receive

[futurepaul]

No more bip21, just lightning and bitcoin address. need to test this out with ben's upcoming pr so we make sure we can handle all the potential scenarios

[futurepaul]

https://no-more-unified.mutiny-web.pages.dev/

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[AnthonyRonning]

This is incorrect.

[AnthonyRonning]

Also, we should allow someone to just hit continue for 0 amount on chain. There's no reason they need to do anything for it.

[futurepaul]

addressed @TonyGiorgio comments and also @benthecarman I think I fixed the flicker #1125

[futurepaul]

closes #1126 as well

[AnthonyRonning]

I also fix dust amount errors in my fedimint onchain mutiny-node PR, but good to have it in both.

[futurepaul]

Good idea, i think i had to get rid of that when we had the remember selection checkbox