Moved README into action_view [ci skip]
Refactor Date, Time, DateTime timezone methods

Similar implementations of #in_time_zone exists for Date, Time and DateTime so
method is extracted into its own module. Also some logic is extracted into
private method.
use bind values for model types
Merge pull request #11686 from gzohari/pr-refactor-time-datetime

Refactor Date, Time, DateTime timezone methods
push some validation up to the factory method
we should not allow invalid objects to be constructed
pass the mixin in to the code generation methods
no need to to_sym
callback should always have a value
Revert "all `scope_chain` methods allocate new arrays, no need to dup"

This reverts commit 1468a4b89aa4bca99160bfa03572b2c0ab348db5.
do is_a? tests on assignment so runtime is faster
oops! :bomb:
Merge pull request #11689 from arunagw/readme-updated-av

Moved README into action_view [ci skip]