feat(rails): add caching to rails g generator

[Zeko369]

No description provided.

[withfig-bot]

Overview

src/rails.ts:

Info:

URLs:

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• https://avatars.githubusercontent.com/u/4223?s=48&v=4

[withfig-bot]

Hello @Zeko369,
thank you very much for creating a Pull Request!
Here is a small checklist to get this PR merged as quickly as possible:

• Do all subcommands / options which take arguments include the args property (args: {})?
• Are all options modular? E.g. -a -u -x instead of -aux
• Have all other checks passed?

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