Move string to a string resource file like Strings.resx/Strings.resx.cs

What do you think about adding a refactoring option to move a hard-coded string to a `.resx` file?
For example:
`throw new ArgumentException("Invalid username.", nameof(username));`
Changes to:
`throw new ArgumentException(Strings.Invalidusername, nameof(username));`

Refactoring operation must add a Strings.resx file to project (if not exists) and generate required properties. Maybe user be able to select different `.resx` files from a list?

Do you think it's a good idea?

The issue names no files, tests, or entry points. Start by locating Roslynator's existing refactoring implementations and resource-generation handling, then define how a hard-coded string is selected, how a .resx file and properties are generated, and whether users can choose among resource files. Done would require an agreed scope and tests covering these behaviors.

Written by the indexing model from the issue text.