feat: inline return statement of arrow function

[sxzz]

Description

Add a built-in command inline-arrow

Inline return statement of arrow function.

Triggers:

• /// inline-arrow
• /// ia

/// inline-arrow
const foo = async (msg: string): void => {
  return fn(msg)
}

Will be converted to:

const foo = async (msg: string): void => fn(msg)

Linked Issues

Additional context