Add Azure to readme [ci skip]

previously https://github.com/rails/activestorage/pull/86

Add Azure configuration to Active Storage template

Use duktape gem as default JS engine on Windows-MINGW

With Active Storage supporting Azure, we should show people how to set it up.

Incorporates the minor changes originally in https://github.com/rails/activestorage/pull/88 as well

The fallback javascript engine on Windows is Windows Script Host (JScript).
However this engine isn't able to process the default assets, because it supports
ES3 only but the coffeescript compiler requires ES5.

Fixes #30014

Since this test changed in 92209356 I noticed that it really doesn't make
sense anymore. I split the tests into 2 groups to explain what each one
does.

First these routes should throw a `bad_request` when the encoding isn't
valid. We're expecting UTF8 encoding and passing binary, that should be
a bad request.

For the second test we are setting the `show` route to set
`self.binary_params_for?` for that route which will convert the
parameters and return a `:ok` instead of a `:bad_request`.

Remove unnecessary `doc` directory deletion

Let ActiveStorage tests pass only for Disk

Remove HTTParty dependency

"httparty" is only added in #30020 to write two tests to make PUT requests
against S3 and GCS.

The same requests can be made with net/http, removing a dependency from the Gemfile.

This commit changes the behavior such the path_params now default to
UTF8 just like regular parameters. This also changes the behavior such
that if a path parameter contains invalid UTF8 it returns a 400 bad
request. Previously the behavior was to encode the path params as binary
but that's not the same as query params.

So this commit makes path params behave the same as query params.

It's important to test with a path that's encoded as binary because
that's how paths are encoded from the socket. The test that was altered
was changed to make the behavior for bad encoding the same as query
params. We want to treat path params the same as query params. The params
in the test are invalid UTF8 so they should return a bad request.

Fixes #29669

*Eileen M. Uchitelle, Aaron Patterson, & Tsukuru Tanimichi*

If you have a "service/configurations.yml" file, but every single line is
commented out, then an error occurs when running tests:

```
git:active-storage-import~/code/rails/activestorage$ rake
~/code/rails/activestorage/test/test_helper.rb:17:in `<top (required)>': undefined method `deep_symbolize_keys' for false:FalseClass (NoMethodError)
	from ~/code/rails/activestorage/test/controllers/direct_uploads_controller_test.rb:1:in `require'
```

The reason is that `YAML.load(..an empty file content..)` simply returns `false`, and not `{}`.

This PR fixes this behavior so tests can also run when no remote service
is available.

[ci skip] Fix rails_command comments

Fix rubocop issues

Remove redundant `unless current_adapter?(:OracleAdapter)`

Since 553b6958, `doc` directory is not created in application.

[ci skip]

Closes #30012

And make reference to `Relation`.