[epic]: master tracking issue for prod taproot channels spec PRs

[Roasbeef]

Overview

This is a master tracking issue to more easily track the series of stacked PRs that inch our taproot channels support closer to the final "prod" deployment.

Stacked PRs

• input: update taproot scripts to add an option for the miniscript compat versions from latest spec #9639

  • This PR updates the way we define scripts in input to use txscript.ScriptTemplate (a sort of mini-DSL for Scripts inside Go templates).
  • It also adds a new functional option to to enable using the slight (supposedly more miniscript compatible) scripts.

• actor: add new package for structured concurrency based on the Actor model  #9820

  • Adds a new actor pattern to implement patterns for structured concurrency, in order to standardize a pattern that we frequently use across the codebase.

• multi: add new rbf coop close actor for RPC server fee bumps #9821

  • Uses the above PR to fix some anti-patterns that the current RBF coop close state machine had to adopt in order to deal with edge cases re the lifecycle of a link, peers, etc.

• lnwire+lnwallet: add LocalNonces field for splice nonce coordination w/ taproot channels  #9982

  • Adds a set of new TLVs to make the channel_ready message splice-ready. No functional changes here, we just check both of these fields and go with the one that's populated (as we don't support splicing yet).

• multi: implement awareness of the final/production taproot channel variant #9985

  • Builds on top of the prior PR. It makes a new taproot channel type that uses the slightly modified scripts.

• multi: add taproot support to the new RBF close flow  #10063

  • Extends the RBF close state machine w/ support for taproot channels (JIT nonce exchange).