Front-load OpenUI Cloud setup in CLI

[zahlekhan]

Summary:

• Front-load create-flow choices before dependency install
• Add ranked create funnel telemetry, including scaffold/dependency outcomes
• Update CLI docs for AI setup and existing create flags

Checks:

• tsc -p packages/openui-cli
• eslint ./src --ignore-pattern 'src/templates/**'
• prettier --check './src/' '!./src/templates/'
• quick smoke creates with --no-install/--no-skill