Initial Work on Documentation

docs/source/usage.string.rst

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+String Type
+=================
+
+The String type has the following supported properties:
+
+- maxLength: Maximum length of the string.
+- minLength: Minimum length of the string.
+- pattern: Regular expression pattern that the string must match.
+- format: A string format that can be used to validate the string (e.g., "email", "uri").
+
+And the additional generic properties:
+
+- default: Default value for the string.
+- description: Description of the string field.
+
+
+Examples
+-----------------
+
+1. Basic String with maxLength and minLength:
+
+.. code-block:: python
+
+    from jambo import SchemaConverter
+
+
+    schema = {
+        "title": "StringExample",
+        "type": "object",
+        "properties": {
+            "email": {
+                "type": "string",
+                "minLength": 5,
+                "maxLength": 50,
+            },
+        },
+        "required": ["email"],
+    }
+
+    Model = SchemaConverter.build(schema)
+
+    obj = Model(email="this_is_a_valid_string")
+    print(obj)
+    # Output: StringExample(email='this_is_a_valid_string')
+
+2. String with pattern and format: