feat: add projection options

[Tochemey]

close #38

[codecov]

Codecov Report

Attention: 85 lines in your changes are missing coverage. Please review.

Comparison is base (880741c) 70.46% compared to head (ea017c4) 70.46%.

Additional details and impacted files

@@           Coverage Diff            @@
##             main      #39    +/-   ##
========================================
  Coverage   70.46%   70.46%            
========================================
  Files          15       16     +1     
  Lines        1686     1869   +183     
========================================
+ Hits         1188     1317   +129     
- Misses        384      425    +41     
- Partials      114      127    +13     

Files	Coverage Δ
eventstore/memory/memory.go	73.28% <ø> (ø)
projection/option.go	100.00% <100.00%> (ø)
projection/recovery.go	100.00% <100.00%> (ø)
engine.go	52.94% <0.00%> (-7.06%)	⬇️
offsetstore/memory/memory.go	69.09% <70.14%> (-0.08%)	⬇️
projection/runner.go	77.86% <79.84%> (+2.21%)	⬆️
offsetstore/postgres/postgres.go	58.51% <63.63%> (+0.88%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.