feat(abci): ABCI shim for running against a standalone ABCI app

[jmalicevic]

See: #479

TODO

• Vote extensions
  • Add support for ExtendVote
  • Add support for VerifyVoteExtension

---

The changes below allow Malachite to call into a standalone ABCI based app running on a socket whose address is defined below.

The application used can be found in the following repo:

Instructions to run for a two node setup:

1. Start two instances of the app with different socket addresses:
   • /tmp/kvstoreplusplus0.sock
   • /tmp/kvstoreplusplus1.sock
2. In a separate window start Malachite
   • ./scripts/spawn.bash --home x --nodes 2

In the log files of malachite you should be seeing transactions showing up (the printf from the actor).
The application is setup to send transactions in PrepareProposal, stores them in a local variable within ProcessProposal and checks whether they are received again in FinalizeBlock.

Malachite takes the transactions from the decided block in Decide and sends them to the app in FinalizeBlock.

If there is any mismatch the app will panic.

---

PR author checklist

• Reference GitHub issue
• Ensure PR title follows the conventional commits spec

[codecov]

Codecov Report

Attention: Patch coverage is 3.95683% with 1335 lines in your changes missing coverage. Please review.

Project coverage is 71.26%. Comparing base (01111d2) to head (0626c86).
Report is 232 commits behind head on main.

Files with missing lines	Patch %	Lines
code/crates/abci/host/src/actor.rs	0.00%	257 Missing ⚠️
code/crates/abci/app/src/spawn.rs	0.00%	129 Missing ⚠️
code/crates/abci/host/src/streaming.rs	0.00%	104 Missing ⚠️
code/crates/abci/host/src/context.rs	0.00%	93 Missing ⚠️
code/crates/abci/host/src/build_proposal.rs	0.00%	88 Missing ⚠️
code/crates/abci/host/src/abci/app.rs	0.00%	82 Missing ⚠️
code/crates/abci/p2p-types/src/transaction.rs	0.00%	79 Missing ⚠️
code/crates/abci/host/src/abci/client.rs	0.00%	77 Missing ⚠️
code/crates/abci/host/src/impls.rs	0.00%	69 Missing ⚠️
code/crates/abci/app/src/codec.rs	0.00%	48 Missing ⚠️
... and 15 more

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #463       +/-   ##
===========================================
- Coverage   83.87%   71.26%   -12.61%     
===========================================
  Files         111      135       +24     
  Lines        7570     8948     +1378     
===========================================
+ Hits         6349     6376       +27     
- Misses       1221     2572     +1351     

Flag	Coverage Δ
integration	71.28% <3.96%> (-12.77%)	⬇️
mbt	22.09% <ø> (ø)

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