ActiveRecord's migrate tasks are required since v2.7.5 (#588).

Make `annotate_routes` depend on `set_annotation_options` just as `annotate_models` does.

Fixes #761.

Rails 6 adds a new set of migration tasks for multi-database
apps. This change makes the annotate_models_migrate hooks
aware of them.

The scope of this pull request is to allow annotate_models to generate models documentation using YARD. This is the first step, I'll add more features later.

This change converts .all_options into a constant and moves it into Annotate::Constants. It also changes usages of .all_options.

Adds option for additional file patterns (implemented in #633) in the CLI.

Add --frozen option to abort instead of write annotation.
This is mainly for CI environment to detect missing annotation.
Similar motivation with bundle install --frozen.

works like:
```
$ rake db:migrate frozen=yes

annotate error. spec/models/user_spec.rb needs to be updated, but annotate was run with `--frozen
```

Since Rails full engines run as non-namespaced applications but all their app-related tasks still prefixed with `app:`

- Use Rake::Task#enhance insteaad of defining same tasks again
- Remove hooking db:migrate:change task which doesn't exist
- Fix hooking db:migrate:reset task so that the annotation runs after
  all migration tasks (#548)

* :with_comment option is flag
* It should use `true?` instead of `fallback`.

* Hook up with-comment option to rake tasks and CL.
* with_comment option handles commentless columns.
* Style fixes.

Fixes #468.

Rename lib/tasks/migrate.rake something more unique to avoid conflicts.

* Prevent root_dir option from being empty

When setting root_dir to an empty string (as is done in the default rake
task config) this line previously caused root_dir to become an empty
array.

This in turn caused factories, specs etc not to be annotated.

This is just a quick band-aid on a larger problem. We have option
parsing spread out over many different places, with slight mismatches
like this in the assumptions made.

* Handle blank values & comma-separated strings in AnnotateModels.root_dir

These cases are currently handled (inconsistently) in the different
option parsing routines.

* Pass root_dir forward unmodified

The different cases are now handled inside AnnotateModels

* add option to exclude STI subclasses from annotation

Reduced the Cyclomatic complexity.
#330 By default didn't annotate activeadmin models.
This close #330

Do not annotate controllers, helpers and scaffolds by default (revert to behavior from previous version)

[ fixes #252 ]

Add option for classified annotation (id first, timestamps/assotiactions last)

require activesupport core extension .blank?

Add option for classified annotation (id first, timestamps/assotiactions last)

Fix bug

Restore gemspec file