Demisto-sdk

* Added a validation to ensure correct image and description file names.
* Fixed an issue where the **validate** command failed when 'display' field in credentials param in yml is empty but 'displaypassword' was provided.
* Added the **integration-diff** command to check differences between two versions of an integration and to return a report of missing and changed elements in the new version.
* Added a validation verifying that the pack's README.md file is not missing or empty for partner packs or packs contains use cases.
* Added a validation to ensure that the integration and script folder and file names will not contain separators (`_`, `-`, ``).
* When formatting new pack, the **format** command will set the *fromversion* key to 5.5.0 in the new files without fromversion.

* Added a validation that core packs are not dependent on non-core packs.
* Added a validation that a pack name follows XSOAR standards.
* Fixed an issue where in some cases the `get_remote_file` function failed due to an invalid path.
* Fixed an issue where running **update-release-notes** with updated integration logo, did not detect any file changes.
* Fixed an issue where the **create-id-set** command did not identify unified integrations correctly.
* Fixed an issue where the `CommonTypes` pack was not identified as a dependency for all feed integrations.
* Added support for running SDK commands in private repositories.
* Fixed an issue where running the **init** command did not set the correct category field in an integration .yml file for a newly created pack.
* When formatting new contributed pack, the **format** command will set the *fromversion* key to 6.0.0 in the relevant files.
* If the environment variable "DISABLE_SDK_VERSION_CHECK" is define, the demisto-sdk will no longer check for newer version when running a command.
* Added the `--use-pack-metadata` flag for the **find-dependencies** command to update the calculated dependencies using the the packs metadata files.
* Fixed an issue where **validate** failed on scripts in case the `outputs` field was set to `None`.
* Fixed an issue where **validate** was failing on editing existing release notes.
* Added a validation for README files verifying that the file doesn't contain template text copied from HelloWorld or HelloWorldPremium README.

* Added a validation that layoutscontainer's id and name are matching. Updated the format of layoutcontainer to include update_id too.
* Added a validation that commands' names and arguments in core packs, or scripts' arguments do not contain the word incident.
* Fixed issue where running the **generate-docs** command with -c flag ran all the commands and not just the commands specified by the flag.
* Fixed the error message of the **validate** command to not always suggest adding the *description* field.
* Fixed an issue where running **format** on feed integration generated invalid parameter structure.
* Fixed an issue where the **generate-docs** command did not add all the used scripts in a playbook to the README file.
* Fixed an issue where contrib/partner details might be added twice to the same file, when using unify and create-content-artifacts commands
* Fixed issue where running **validate** command on image-related integration did not return the correct outputs to json file.
* When formatting playbooks, the **format** command will now remove empty fields from SetIncident, SetIndicator, CreateNewIncident, CreateNewIndicator script arguments.
* Added an option to fill in the developer email when running the **init** command.

* Updated the **validate** command to check that the 'additionalinfo' field only contains the expected value for feed required parameters and not equal to it.
* Added a validation that community/partner details are not in the detailed description file.
* Added a validation that the Use Case tag in pack_metadata file is only used when the pack contains at least one PB, Incident Type or Layout.
* Added a validation that makes sure outputs in integrations are matching the README file when only README has changed.
* Added the *hidden* field to the integration schema.
* Fixed an issue where running **format** on a playbook whose `name` does not equal its `id` would cause other playbooks who use that playbook as a sub-playbook to fail.
* Added support for local custom command configuration file `.demisto-sdk-conf`.
* Updated the **format** command to include an update to the description file of an integration, to remove community/partner details.

* 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.