add the swift code snippet in the fabric native component section

[divyanshu-patil]

Description

the current documentation lacks the swift code for Fabric native component the example shows java and kotlin as option for android but lacks the swift and obj c code demo for same example for ios

What is the problem?

the documentation should add the swift implementation of the fabric native component as many dev who knows swift but lacks knowledge of the obj c may get confused

How can we address it?

add the swift option in the fabric native component section link: https://reactnative.dev/docs/fabric-native-components-introduction

Why is it important?

it will help developers to understand swift implementation of code

Who needs this?

new learners and swift coders

When should this happen (use version numbers if needed)?

we can implement this any version that support new fabric native component