Introduce XSD to JSON Schema generator

[chathuranga-jayanath-99]

Purpose

This PR introduces support for the data mapper to handle input and output from an XSD schema. To enable this functionality, it includes the necessary changes to generate a corresponding JSON schema from the XSD schema.

This update introduces support for handling both Complex and Simple types in the XSD schema through specialized processors: ComplexTypeProcessor and SimpleTypeProcessor.

Complex Type Example

<xs:complexType name="PersonType">
    <xs:sequence>
        <xs:element name="FirstName" type="xs:string"/>
        <xs:element name="LastName" type="xs:string"/>
        <xs:element name="Age" type="xs:int"/>
    </xs:sequence>
</xs:complexType>

Simple Type Example

<xs:element name="FirstName" type="xs:string"/>

For JSON schema generation, we introduce the JsonSchemaNode class as the parent class, with the following subclasses to handle different schema elements:

• JsonSchemaArrayNode: Represents an array in the JSON schema.
• JsonSchemaObjectNode: Represents an object type node in the JSON schema.
• JsonSchemaElementValueNode: Represents an object type node for elements that accept both values and attributes in the XSD.
• JsonSchemaOneOfNode: Represents an object with oneOf field containing multiple schema objects .

These changes provide a structure for processing and generating both XSD and JSON schema representations.