Follow up to 625baa69

The logger interface to get all Rails features is not obvious. This change adds documentation on how to assign a logger that will use all Rails features.

We are also matching the stdout logging interface to the default logger in bootstrap https://github.com/rails/rails/blob/f5a5988352b165143f0f9d622707c351c1470882/railties/lib/rails/application/bootstrap.rb#L42-L45.

`config.assets.raise_runtime_errors` and `config.assets.digest` are enabled
by default in sprockets-rails 3.

`scaffold_stylesheet` was added in #20479.

* Fix typos/grammar errors
* Make capitalization/naming consistent

(e.g. `rails:update` and `rails:template` tasks is renamed to `app:update` and `app:template`.)

This also marks Action Cable routes as internal to Rails.

- Remove ActionController `logger` and `initialize_framework_caches`
  which were merged into `set_configs` in fbc9d0f4
- Rename ActiveRecord `set_reloader_hooks` changed in 283a0876
- Add missing initializers for ActionController and ActiveRecord

add some documentation and add 4 tests regarding error vs. warning behavior

fix a typo when referring to the message

go back to default in tests so that ordering is not important. use a constant instead of method. fix assert_nothing_raised call. use self.klass to allow per class configuration

remove logger warn assets as that is tested elsewhere. pass error_on_ignore through find_each and find_in_batches also.

add blocks to the finds so that the code is actually executed

put the setting back to default in an ensure

Add a changelog entry

- sprockets-rails no longer supports customizing cache store after
  rails/sprockets-rails@ecaeb27 using `config.assets.cache_store`.
- Instead we need to configure it using block syntax.
- Fixes #19835.

- Fixes #22836.

[skip ci]

Follow up to #22642.

`I18n.translate` helper will wrap the missing translation keys
in a <span> tag only if `debug_missing_translation` configuration has
a truthy value. Default value is `true`. For example in `application.rb`:

    # in order to turn off missing key wrapping
    config.action_view.debug_missing_translation = false

Before this commit, the sole presence of the Listen constant
enabled the evented file watcher (unless listen resorted to
the polling backend).

This way, applications may depend on listen for other stuff
independently of this feature. Also, allows teams with mixed
setups to decide at boot time whether the evented watcher
should be enabled for each particular instance.

Use an example from a default Rails app (4.2.5) rather than an outdated one in the Configuring Rails Components section.
I picked config.time_zone as it currently is the only 'setting for Rails' left in a default config/application.rb.

I stumbled upon this with investigating autoloading in a legacy app, which still included the example comment "# config.autoload_paths += %W(#{config.root}/extras)". Usually adding app/* directories to autoload_paths isn't necessary, so also finding this example within the current docs was a bit confusing initially.

[ci skip]

This reverts commit 16ce41b7.

Reason: See
https://github.com/rails/rails/commit/16ce41b7f4449d6df15df30d69aef18da6510f36#commitcomment-14475125

Also call it `public_server.index_name` so it'll make more sense.

3.0.3 has a bug in OS X.

Should use `public_file_server.enabled` instead.

Clarified that static files will be served from the public directory, where it made sense.

Also removed occurrence of the deprecated `static_cache_control`.

Original:
    * `config.active_record.belongs_to_required_by_default` is a boolean
      value and controls whether `belongs_to` association is required by
      default.

Modified version:
    * `config.active_record.belongs_to_required_by_default` is a boolean
      value and controls whether validation error is triggered by
      default if `belongs_to` association is not present or not valid.

namespace is not needed anymore.

Added custom configuration through config_for which parses a yml file in
config folder.

Move from `AS::Callbacks::CallbackChain.halt_and_display_warning_on_return_false`
to `AS::Callbacks.halt_and_display_warning_on_return_false` base on
[this
discussion](https://github.com/rails/rails/pull/21218#discussion_r39354580)

Fix the documentation broken by 0a120a81