Demisto-sdk

* Updated the format of the outputs when using the *--json-file* flag to create a JSON file output for the **validate** and **lint** commands.
* Added the **doc-review** command to check spelling in .md and .yml files as well as a basic release notes review.
* Added a validation that a pack's display name does not already exist in content repository.
* Fixed an issue where the **validate** command failed to detect duplicate params in an integration.
* Fixed an issue where the **validate** command failed to detect duplicate arguments in a command in an integration.

* Fixed an issue where the **validate** command failed to validate the release notes of beta integrations.
* Updated the **upload** command to support indicator fields.
* The **validate** and **update-release-notes** commands will now check changed files against `demisto/master` if it is configured locally.
* Fixed an issue where **validate** would incorrectly identify files as renamed.
* Added a validation that integration properties (such as feed, mappers, mirroring, etc) are not removed.
* Fixed an issue where **validate** failed when comparing branch against commit hash.
* Added the *--no-pipenv* flag to the **split-yml** command.
* Added a validation that incident fields and incident types are not removed from mappers.
* Fixed an issue where the *c
reate-id-set* flag in the *validate* command did not work while not using git.
* Added the *hiddenusername* field to the integration schema.
* Added a validation that images that are not integration images, do not ask for a new version or RN

* Do not collect optional dependencies on indicator types reputation commands.
* Fixed an issue where downloading indicator layoutscontainer objects failed.
* Added a validation that makes sure outputs in integrations are matching the README file.
* Fixed an issue where the *create-id-set* flag in the **validate** command did not work.
* Added a warning in case no id_set file is found when running the **validate** command.
* Fixed an issue where changed files were not recognised correctly on forked branches in the **validate** and the **update-release-notes** commands.
* Fixed an issue when files were classified incorrectly when running *update-release-notes*.
* Added a validation that integration and script file paths are compatible with our convention.
* Fixed an issue where id_set.json file was re created whenever running the generate-docs command.
* added the *--json-file* flag to create a JSON file output for the **validate** and **lint** commands.

* Fixed an issue where merge id_set was not updated to work with the new entity of Packs.
* Added a validation that the playbook's version matches the version of its sub-playbooks, scripts, and integrations.

* Changed the *skip-id-set-creation* flag to *create-id-set* in the **validate** command. Its default value will be False.
* Added support for the 'cve' reputation command in default arg validation.
* Filter out generic and reputation command from scripts and playbooks dependencies calculation.
* Added support for the incident fields in outgoing mappers in the ID set.
* Added a validation that the taskid field and the id field under the task field are both from uuid format and contain the same value.
* Updated the **format** command to generate uuid value for the taskid field and for the id under the task field in case they hold an invalid values.
* Exclude changes from doc_files directory on validation.
* Added a validation that an integration command has at most one default argument.
* Fixing an issue where pack metadata version bump was not enforced when modifying an old format (unified) file.
* Added validation that integration parameter's display names are capitalized and spaced using whitespaces and not underscores.
* Fixed an issue where beta integrations where not running deprecation validations.
* Allowed adding additional information to the deprecated description.
* Fixing an issue when escaping less and greater signs in integration params did not work as expected.

* Added a validation that the classifier of an integration exists.
* Added a validation that the mapper of an integration exists.
* Added a validation that the incident types of a classifier exist.
* Added a validation that the incident types of a mapper exist.
* Added support for *text* argument when running **demisto-sdk update-release-notes** on the ApiModules pack.
* Added a validation for the minimal version of an indicator field of type grid.
* Added new validation for incident and indicator fields in classifiers mappers and layouts exist in the content.
* Added cache for get_remote_file to reducing failures from accessing the remote repo.
* Fixed an issue in the **format** command where `_dev` or `_copy` suffixes weren't removed from the `id` of the given playbooks.
* Playbook dependencies from incident and indicator fields are now marked as optional.
* Mappers dependencies from incident types and incident fields are now marked as optional.
* Classifier dependencies from incident types are now marked as optional.
* Updated **demisto-sdk init** command to no longer create `created` field in pack_metadata file
* Updated **generate-docs** command to take the parameters names in setup section from display field and to use additionalinfo field when exist.
* Using the *verbose* argument in the **find-dependencies** command will now log to the console.
* Improved the deprecated message validation required from integrations.
* Fixed an issue in the **generate-docs** command where **Context Example** section was created when it was empty.