feat(simulator): implement bare bone version of simulator

[numinnex]

Bare bone version of simulator, further progress is blocked by #2687

[codecov]

Codecov Report

❌ Patch coverage is 1.85185% with 530 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.81%. Comparing base (4052619) to head (4ca7481).

Files with missing lines	Patch %	Lines
core/simulator/src/bus.rs	0.00%	101 Missing ⚠️
core/simulator/src/lib.rs	0.00%	90 Missing ⚠️
core/metadata/src/impls/metadata.rs	0.00%	70 Missing ⚠️
core/simulator/src/deps.rs	0.00%	64 Missing ⚠️
core/simulator/src/client.rs	0.00%	54 Missing ⚠️
core/simulator/src/main.rs	0.00%	48 Missing ⚠️
core/consensus/src/impls.rs	0.00%	32 Missing ⚠️
core/simulator/src/replica.rs	0.00%	25 Missing ⚠️
core/common/src/types/consensus/header.rs	0.00%	21 Missing ⚠️
core/common/src/types/consensus/message.rs	0.00%	15 Missing ⚠️
... and 3 more

❌ Your patch check has failed because the patch coverage (1.85%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2688      +/-   ##
==========================================
- Coverage   69.52%   68.81%   -0.71%     
==========================================
  Files         568      574       +6     
  Lines       55238    55668     +430     
  Branches    55238    55668     +430     
==========================================
- Hits        38404    38309      -95     
- Misses      14956    15484     +528     
+ Partials     1878     1875       -3     

Flag	Coverage Δ
rust	68.81% <1.85%> (-0.71%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
core/common/src/sender/mod.rs	90.47% <ø> (ø)
core/consensus/src/vsr_timeout.rs	52.76% <ø> (ø)
core/message_bus/src/cache/connection.rs	0.00% <ø> (ø)
core/metadata/src/stm/stream.rs	0.00% <ø> (ø)
core/message_bus/src/lib.rs	0.00% <0.00%> (ø)
core/metadata/src/stm/mux.rs	94.73% <87.50%> (+9.02%)	⬆️
core/metadata/src/stm/mod.rs	45.90% <27.27%> (-6.73%)	⬇️
core/common/src/types/consensus/message.rs	55.46% <0.00%> (-19.26%)	⬇️
core/common/src/types/consensus/header.rs	10.84% <0.00%> (-16.75%)	⬇️
core/simulator/src/replica.rs	0.00% <0.00%> (ø)
... and 7 more

... and 4 files with indirect coverage changes

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