Add options for registering javascripts.

[lanzhiheng]

I have replace the turbolink with turbo in my project. so I think it will be better to generate <script> tag like below

<script src='assets/admin.js' data-turbo-track='reload'></script>

However, the method register_javascript don't support options like config.register_stylesheet

I think it will be a good idea to make it customizable

config.register_stylesheet 'active_admin.css', media: 'screen', 'data-turbo-track': 'reload'
config.register_javascript 'active_admin.js', 'data-turbo-track': 'reload'

[nitsujri]

Would love to get this one loaded as hotwire becomes more readily used.

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (d4cd830) 99.01% compared to head (04f5a65) 99.01%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7002   +/-   ##
=======================================
  Coverage   99.01%   99.01%           
=======================================
  Files         197      197           
  Lines        4950     4950           
=======================================
  Hits         4901     4901           
  Misses         49       49           

Impacted Files	Coverage Δ
lib/active_admin/asset_registration.rb	100.00% <100.00%> (ø)
lib/active_admin/engine.rb	100.00% <100.00%> (ø)
lib/active_admin/views/pages/base.rb	100.00% <100.00%> (ø)

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