o1vm/pickles: initialize the structure

[dannywillems]

I am not able to run it now (unstable Internet connection).
Use

cargo run --bin pickles_o1vm \
    --all-features \
    --release \
    -p o1vm -- \        
      --pprof.cpu \
      --info-at "${INFO_AT:-%10000000}" \
      --snapshot-state-at "${SNAPSHOT_STATE_AT:-%10000000}" \
      --proof-at never \
      --stop-at "${STOP_AT:-never}" \
      --input "${ZKVM_STATE_FILENAME:-./state.json}" \
      -- \
      ./ethereum-optimism/op-program/bin/op-program \
      --log.level DEBUG \
      --l1 "${L1_RPC}" \
      --l2 "${L2_RPC}" \
      --network sepolia \
      --datadir "${OP_PROGRAM_DATA_DIR}" \
      --l1.head "${L1_HEAD}" \
      --l2.head "${L2_HEAD}" \
      --l2.outputroot "${STARTING_OUTPUT_ROOT}" \
      --l2.claim "${L2_CLAIM}" \
      --l2.blocknumber "${L2_BLOCK_NUMBER}" \
      --server

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 51 lines in your changes missing coverage. Please review.

Project coverage is 70.91%. Comparing base (72fc39f) to head (f5ba002).
Report is 25 commits behind head on master.

Files with missing lines	Patch %	Lines
o1vm/src/pickles/main.rs	0.00%	51 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2584      +/-   ##
==========================================
- Coverage   70.98%   70.91%   -0.07%     
==========================================
  Files         240      241       +1     
  Lines       57707    57758      +51     
==========================================
- Hits        40963    40961       -2     
- Misses      16744    16797      +53     

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[dannywillems]

Running the command on my machine.

[dannywillems]

I confirm the code runs on my machine. It doesn't do much for now.
I will add in a follow-up PR a way to change the flavor of the o1vm we want to run.