Add raw_result to CommandResultItem

[jiasli]

Add raw_result to CommandResultItem, so that the raw result (before query) can be used by post-output hint (Azure/azure-cli#16242).

[jiasli]

Send the full CommandResultItem in case post-output hint relies on other attributes:

knack/knack/util.py

Lines 23 to 32 in 587abe5

	class CommandResultItem(object): # pylint: disable=too-few-public-methods
	def __init__(self, result, table_transformer=None, is_query_active=False,
	exit_code=0, error=None, raw_result=None):
	self.result = result
	self.error = error
	self.exit_code = exit_code
	self.table_transformer = table_transformer
	self.is_query_active = is_query_active
	# The result before applying query
	self.raw_result = raw_result

[evelyn-ys]

Can we add another parameter into EVENT_CLI_SUCCESSFUL_EXECUTE to keep cmd_result instead of overwrite the value of result?

Although azure-cli didn't use EVENT_CLI_SUCCESSFUL_EXECUTE event now, but I'm afraid some other cli depend on knack might face breaking change in result type. Since event handler func usually use func(*arg, **kwargs) so adding new paremeter won't cause breaking change.

[jiasli]

Adding arg in function invocation may also trigger breaking change if the callee doesn't accept the new arg.

We never guaranteed there will be no breaking changes:

https://github.com/microsoft/knack

The project is in initial development phase. We recommend pinning to at least a specific minor version when marking knack as a dependency in your project.

[evelyn-ys]

Ok with me if breaking change is acceptable😆