feat: Added Enum file for contentType

[tiwarishubham635]

Fixes

Added Enum file for contentType supporting Form url encoded and JSON type

Checklist

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• I have read the Contribution Guidelines and my PR follows them
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• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

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[sonarcloud]

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