Support custom response for batch actions

[jowilf]

closes #207

[github-actions]

🚀 Deployed on https://docs-preview-212--starlette-admin-docs-preview.netlify.app

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (019dc95) 100.00% compared to head (33a1320) 100.00%.

❗ Current head 33a1320 differs from pull request most recent head a6900e2. Consider uploading reports for the commit a6900e2 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #212   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           68        68           
  Lines         4922      4939   +17     
=========================================
+ Hits          4922      4939   +17     

Impacted Files	Coverage Δ
starlette_admin/actions.py	100.00% <ø> (ø)
tests/test_i18n.py	100.00% <ø> (ø)
starlette_admin/base.py	100.00% <100.00%> (ø)
starlette_admin/contrib/odmantic/middleware.py	100.00% <100.00%> (ø)
starlette_admin/contrib/sqla/middleware.py	100.00% <100.00%> (ø)
starlette_admin/contrib/sqla/view.py	100.00% <100.00%> (ø)
starlette_admin/views.py	100.00% <100.00%> (ø)
tests/test_custom_actions.py	100.00% <100.00%> (ø)

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