Implement read-only useClipboard

[erayerdin]

Description

Closes #200

Type of Change

• Bug fix
• New hook
• Enhancement to existing hook
• Documentation update
• Other (please describe)

Checklist

• I have read the Contributing Guide
• My code follows the project's coding style
• I have added tests for my changes
• All existing tests pass
• I have updated the documentation

---

The only thing left to do is to update the existing documentation. There are many, I mean, many markdown files. Some of them are for Docusaurus, some of them are for Astro. I was going to update it but I'm kind of confused. Can you inform me about how the docs build?

[childrentime]

Thanks for the PR! Two concerns:

1. The option semantics look inverted. With options = { read: false } as default, read is false, so if (read) return is skipped and reading still runs — the default behavior is preserved by accident. But that means read: true actually disables reading, which is the opposite of what the name implies.

2. To keep this non-breaking and intuitive, I'd suggest defaulting read to true (= "reading is enabled", current behavior), and letting users opt out with read: false when they only need writing:

   export const useClipboard: UseClipboard = (options = { read: true }) => {
     const read = options.read ?? true
     const updateText = useCallback(async () => {
       if (!read) return
       // ...
     }, [read])
   }

   Existing users keep working; users hitting the Chrome permission prompt ([Bug] A hook to only copy to clipboard #200) pass { read: false }.

Also: please add a test for the read: false path, and update the docs under packages/website-astro/src/content/docs/.