Support React 19

[pppdns]

Describe:

React 19 stable has been released a week ago, but @vidstack/react is not compatible with it yet.

"peerDependencies": {
  "@types/react": "^18.0.0",
  "react": "^18.0.0"
},

Anything Else?

Using React 19 and Next.js 15, I'm getting this warning:

@vidstack/react 1.12.12
  ├── ✕ unmet peer react@"^18.0.0": found 19.0.0
  └── ✕ unmet peer @types/react@"^18.0.0": found 19.0.1