feat(node): consistent genesis

[cryptoAtwill]

This PR follows this discussion to address #1002.

The flow is simpler now with:

• Addition of SealGenesis command that runs the previous genesis creation logic:
  • Load builtin/custom actor and deploy ipc contracts using memory store. Implementation not changed, just shifted location.
  • Write memory store to Car file.
• InitChain just reads the car file bytes into the StateStore

This PR is just an implementation of the flow, it's a quick way to show if the flow actually works. Pending items to make it ready for review:

• [x] Integration testing. The current state of the PR might have missing steps (unlikely, but possible), will actually perform integration testing to ensure it actually works.
• [x] Unit tests.
• [x] Some further code clean up and simplification.
• [x] Fix broken CI due to this change.

To actually try it out, perform the following:

# generate the fendermint genesis first, then seal the genesis state
cargo run -p fendermint_app --release -- genesis --genesis-file test-network/genesis.json \
  ipc \
    seal-state \
    --builtin-actors-path <FULL PATH TO YOUR BUILT_IN BUNDLE> \
    --custom-actors-path  <FULL PATH TO YOUR CUSTOM BUNDLE> \
    --artifacts-path  <FULL PATH TO YOUR CONTRACT OUT FOLDER> \
    --output-path <FULL PATH TO YOUR SEALED STATE OUTPUT PATH>

# convert to cometbft genesis
cargo run -p fendermint_app --release -- \
  genesis --genesis-file test-network/genesis.json \
  into-tendermint --out ~/.cometbft/config/genesis.json --sealed  <FULL PATH TO YOUR SEALED STATE OUTPUT PATH>

[raulk]

TODO

• [x] Add a version number to the sealed state schema.
• [x] Compress the state tree CAR with Snappy + encode in base64 instead of hex.
• [ ] Add a debugging tool to inspect the state tree. Iterate over the state tree printing actor IDs, code CIDs, actor names (resolved from the Code CID), balances.
• [ ] Update quickstart + user/dev documentation.

[cryptoAtwill]

@karlem I have updated based on the review feedback, please take another look. I will remove old implementation in a follow up PR.