fix: use import type for COBEOptions

[rxxbyy]

Problem

COBEOptions is a type-only export from cobe, but it's imported as a
value. This throws a runtime error in projects with stricter TypeScript
or Vite configurations:

Uncaught SyntaxError: The requested module 'cobe.js' does not provide 
an export named 'COBEOptions'

Triggered by verbatimModuleSyntax: true or isolatedModules: true in tsconfig.json.

Fix

// Before
import createGlobe, { COBEOptions } from 'cobe'

// After
import createGlobe, { type COBEOptions } from 'cobe'

Notes

No runtime behavior changes. Type-only fix.

[vercel]

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