update signTx flow using marina.sendTransaction (psetv2)

[louisinger]

Note that the new provider now returns psetv2 only, it's possible that some changes are needed in bitmatrix-app-ui

TL;DR

• remove ldk from pkg.json -> we'll drop support and use only liquidjs-lib (maybe the file "ldk.ts" should be renamed)
• bump liquidjs-lib & remove resolutions in pkg.json
• rework signTx function using marina.sendTransaction API (marina will handle blinding, coinselection and broadcasting)

PS:

• Marina, Wallet and IWallet seem to be a bit redondant: hard to get the difference between all of them at first read in my opinion.
• any reason to do not commit the yarn.lock file ? I would commit it to ensure we are on the same page while developing.

[tiero]

We may need to update to latest deps

[louisinger]

UPDATE

last commit bumps marina-provider to 3.0.1 (latest). The only change is the importScript method (not needed so not implemented in Wallet interface.

@afarukcali please review