Provide a code action to replace a string with a template string

Suggestion

Provide a code action on a string to replace the string with a template string.

Use Cases

Often you start with a normal string and notice that it should better be a template string. See the example below. When the cursor is inside the string, there should be code action provided 'Replace with template string'

The code action replace the string with a template string

Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

No implementation file or test is named in the issue. Start by locating TypeScript's existing code-action entry points and tests, then use the provided normal-string example as the input case. Done means a cursor inside a normal string offers “Replace with template string” and applies the conversion without changing runtime behavior.