Added Time#middle_of_day

Added middle_of_day method to Date and DateTime
use method with_active_record_default_timezone
interceptor should mimick original method

This fix also makes the test order independent.
Improved the doc about showing posts in getting started guide [ci skip]

- Reference #11644
Merge pull request #11648 from prathamesh-sonpatki/doc-fix

Improved the doc about showing posts in getting started guide [ci skip]
Move changelog entry to the top [ci skip]
Merge pull request #11649 from neerajdotname/use_method_with_active_record_default_timezone

use method with_active_record_default_timezone
Fix handling of offsets with Time#to_s(:iso8601)

Use a lambda to ensure that the generated string respects the offset of
the time value. Also add DateTime#to_s(:iso8601) and Date#to_s(:iso8601)
for completeness.
Fixing the broken URL [skip ci]
Add installation instructions for FreeBSD [ci skip]

Add packages required to setup the rails environment on FreeBSD.
Merge pull request #11653 from ankit8898/typo

Fixing the broken URL [skip ci]
Merge pull request #11651 from neerajdotname/log_should_mimick_original_log_method

interceptor should mimick original method
Merge pull request #11654 from robin850/freebsd

Add installation instructions for FreeBSD [ci skip]
Merge pull request #10879 from makaroni4/master

Added Time#middle_of_day method