Download the JSON as .json and .xml

[PrerakMathur20]

Description

Case Tree visible as Management in CaseTreeView in Pretty Json Format, can now be downloaded as both .json and .xml format.

Fixes #267

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Only the cases' data is extracted in JSON object format
• Only the cases' data is extracted in XML language format

Also, include screenshots for the verification and reviewing purpose.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works (N/A)
• New and existing unit tests pass locally with my changes (N/A)
• Any dependent changes have been merged and published in downstream modules (N/A)

Note: Warnings in Dev Mode console for parsing and converting .json to .xml