Demisto-sdk

* Fixed an issue where **lint** failed where *.Dockerfile* exists prior running the lint command.
* Added FeedHelloWorld template option for *--template* flag in **demisto-sdk init** command.
* Fixed issue where **update-release-notes** deleted release note file if command was called more than once.
* Fixed issue where **update-release-notes** added docker image release notes every time the command was called.
* Fixed an issue where running **update-release-notes** on a pack with newly created integration, had also added a docker image entry in the release notes.
* Fixed an issue where `XSOAR-linter` did not find *NotImplementedError* in main.
* Added validation for README files verifying their length (over 30 chars).
* When using *-g* flag in the **validate** command it will now ignore untracked files by default.
* Added the *--include-untracked* flag to the **validate** command to include files which are untracked by git in the validation process.
* Improved the `pykwalify` error outputs in the **validate** command.
* Added the *--print-pykwalify* flag to the **validate** command to print the unchanged output from `pykwalify`.

* 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.