nest adapter opts

[woylie]

• move ecto-specific schema options to adapter
• move ecto-specific backend options to adapter

relates to #238

[codecov]

Codecov Report

Patch coverage: 95.83% and project coverage change: +0.06 🎉

Comparison is base (bc73df5) 87.99% compared to head (f3c6655) 88.05%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #379      +/-   ##
==========================================
+ Coverage   87.99%   88.05%   +0.06%     
==========================================
  Files          15       15              
  Lines         883      896      +13     
==========================================
+ Hits          777      789      +12     
- Misses        106      107       +1     

Impacted Files	Coverage Δ
lib/flop/nimble_schemas.ex	71.42% <66.66%> (-8.58%)	⬇️
lib/flop.ex	94.68% <100.00%> (+0.07%)	⬆️
lib/flop/adapter/ecto.ex	97.95% <100.00%> (+0.13%)	⬆️
lib/flop/schema.ex	95.38% <100.00%> (+0.14%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.