feat: Add support for gradient in outline border.

[divyanshub024]

Description

This PR adds support to a gradient in the outline Input border.

In order to add the gradient. Just add the gradient object in the border.

                            "border": {
                                "type": "outlineInputBorder",
                                "borderRadius": {
                                    "topLeft": 8,
                                    "topRight": 8,
                                    "bottomLeft": 8,
                                    "bottomRight": 8
                                },
                                "gradient": {
                                    "colors": [
                                        "#acdd22", "#171717"
                                    ]
                                }
                            }

Type of Change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to change)
• Code refactor
• Build configuration change
• Documentation
• Chore

[i-asimkhan]

Looks good.