* add sdk form

* adapt form from SDK to Rasa

* load form action & slot mappings dynamically from domain

* add simple test for RulePolicy

* remove old 'EmbeddingPolicy

* trigger form using default rules

* split stories into ML and rules

* remove warnings

* handle form unhappy paths with RulePolicy

* add `...` to default actions

* fix error when converting domain forms to dict

* update rule symbol to '>>' and fix data generation

* update tqdm desc

* fixes for forms in domain

* make function to remove predictions more general

* omit activation events for forms when deactivating immediately

* adapt rule examples to implementation

* add `is_rule_tracker=True` to tests

* match rule pattern in story file

* add test for immediate submit

* simplify form prediction

* remove unused imports

* FormAction now asks for slot

* unfeaturize `requested_slot`

* fix form submit rule

* implement review comments

* polish

- add todos
- more tests
- more comments

* remove unused variable

* remove print

* Update examples/rules/data/stories.md

* fix max_history error

* check if featurizer is not None as well

* uncomment slack

* add missing events to rules example

* update test stories to changed logic

* fix more tests

* comment extracting other slots from arbitrary entity

Co-authored-by: ricwo <ric.wkr@gmail.com>
Co-authored-by: ricwo <20581300+ricwo@users.noreply.github.com>
Co-authored-by: Vova Vv <mr.voov@gmail.com>

* add NLU component to set fallback intent

* add example rule for simple fallback

* fix form test case

* implement abstract loop interface

* adapt `FormAction` to new `loop` interface

* add `TwoStageFallbackAction`

* add todo for renaming `active_form`

* make NLU fallback intent a hardcoded intent name

It has to be hardcoded since the TwoStageFallbackPolicy relies on it's name, similar to the out of scope intent name

* rename to `loops` (plural)

* implement form unfeaturization

* rename `active_form` to `active_loop`

* adapt tests for rule policy

* use existing `REQUESTED_SLOT` constant

* use full EventVerbosity in TwoStageFallbackAction

* nuke FormPolicy test

The `FormPolicy` will be removed in favor of the `RulePolicy` so no need to fix / adapt the tests here.

* fix ` Duplicate actions in domain` in `rasa interactive`

RulePolicy: scope dispatches per form

* remove form unfeaturization, fix rules

* rename variable

* add validation false event

* remove unneeded method

* Update examples/formbot/data/stories.md

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* add comments and clean rule policy

* Update rasa/core/policies/rule_policy.py

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* Update rasa/core/policies/rule_policy.py

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* Update rasa/core/policies/rule_policy.py

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* Update rasa/core/policies/rule_policy.py

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* black

* Update rasa/core/policies/rule_policy.py

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* Update rasa/core/policies/rule_policy.py

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* fix code quality

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

…s-yaml

YAML rule and form support

* adapt test to new form featurization

* skip 'action_session_start' when serializing story

* fix form rejection emulation for RulePolicy

* both RulePolicy and FormPolicy fulfill the requirement for forms in the domain

* add more types

* fix default max history for RulePolicy

* introduce default actions which can overrule rules

* fix form evaluation tests

* add typing for 'active_loop'

* make type explicit for pytype

* re-add FormPolicy tests

* adapt to new default actions

* fix form featurization logic

The `TestFormPolicy` test which uses the test stories `data/test_stories/stories_form.md` failed previously. The issue was that `applied_events` didn't recognize unhappy paths correctly. Now we assume we are in an unhappy path in case different actions run a user utterance without a form action in between.

* move validation for form policy to `Ensemble`

* don't undo emulation of form rejection

* invert if logic

* add check to avoid RulePolicy usage with other rule-like policies

* add missing FormPolicy import

* fix StoryReader import

* remove unused functions

* some more form action tests

* preserve key order when dumping YAML

* remove debug lines

* improve import

* fix converter

* switch on flag in domain.py

* no special handling for sets

* accept not just dicts

* add test for non-dict types

* have one validate function for the whole form

* remove unused function

* more tests

* remove unnecessary ignores

* add clarification comment

* validate user input in activation (#6172)

* validate user input in activation

Co-authored-by: Tobias Wochinger <t.wochinger@rasa.com>

* more tests for entity extraction

* more `FormAction` tests

* add todo

Co-authored-by: Vladimir Vlasov <vladimir@rasa.com>

Co-authored-by: Tanja <tabergma@gmail.com>

* deprecate old rule-like policies

* only run `FormAction` if users defined a slot mapping for the form in the domain

* remove Todo as TwoStageFallbackPolicy is deprecated anyway

* make it a module function as it has no self reference

* translate rule examples to yaml

* fix slot warning

* add explanation comment to `FallbackClassifier`

* add changelog

* Don't try to generate stories if no StorySteps given

* disable warnings about default intents when RulePolicy is available

* fix test for invalid yaml

Co-authored-by: Tanja <tabergma@gmail.com>