Demisto-sdk

* When in private repo without `DEMSITO_SDK_GITHUB_TOKEN` configured, get_remote_file will take files from the local origin/master.
* Enhanced the **unify** command when giving input of a file and not a directory return a clear error message.
* Added a validation to ensure integrations are not skipped and at least one test playbook is not skipped for each integration or script.
* Added to the Content Tests support for `context_print_dt`, which queries the incident context and prints the result as a json.
* Added new validation for the `xsoar_config.json` file in the **validate** command.
* Added a version differences section to readme in **generate-docs** command.
* Added the *--docs-format* flag in the **integration-diff** command to get the output in README format.
* Added the *--input-old-version* and *--skip-breaking-changes* flags in the **generate-docs** command to get the details for the breaking section and to skip the breaking changes section.

* Enable passing a comma-separated list of paths for the `--input` option of the **lint** command.
* Added new validation of unimplemented test-module command in the code to the `XSOAR-linter` in the **lint** command.
* Fixed the **generate-docs** to handle integration authentication parameter.
* Added a validation to ensure that description and README do not contain the word 'Demisto'.
* Improved the deprecated message validation required from playbooks and scripts.
* Added the `--quite-bc-validation` flag for the **validate** command to run the backwards compatibility validation in quite mode (errors is treated like warnings).
* Fixed the **update release notes** command to display a name for old layouts.
* Added the ability to append to the pack README credit to contributors.
* Added identification for parameter differences in **integration-diff** command.
* Fixed **format** to use git as a default value.
* Updated the **upload** command to support reports.
* Fixed an issue where **generate-docs** command was displaying 'None' when credentials parameter display field configured was not configured.
* Fixed an issue where **download** did not return exit code 1 on failure.
* Updated the validation that incident fields' names do not contain the word incident will aplly to core packs only.
* Added a playbook validation to verify all conditional tasks have an 'else' path in **validate** command.
* Renamed the GitHub authentication token environment variable `GITHUB_TOKEN` to `DEMITO_SDK_GITHUB_TOKEN`.
* Added to the **update-release-notes** command automatic addition to git when new release notes file is created.
* Added validation to ensure that integrations, scripts, and playbooks do not contain the entity type in their names.
* Added the **convert** command to convert entities between XSOAR versions.
* Added the *--deprecate* flag in **format** command to deprecate integrations, scripts, and playbooks.
* Fixed an issue where ignoring errors did not work when running the **validate** command on specific files (-i).

* Added a validation verifying that the pack's README.md file is not equal to pack description.
* Fixed an issue where the **Assume yes** flag did not work properly for some entities in the **format** command.
* Improved the error messages for separators in folder and file names in the **validate** command.
* Removed the **DISABLE_SDK_VERSION_CHECK** environment variable. To disable new version checks, use the **DEMISTO_SDK_SKIP_VERSION_CHECK** envirnoment variable.
* Fixed an issue where the demisto-sdk version check failed due to a rate limit.
* Fixed an issue with playbooks scheme validation.

* Updated the **secrets** command to work on forked branches.

* 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.