feat: select between HTML and shadcn components

packages/create-llama/create-app.ts

packages/create-llama/index.ts

packages/create-llama/templates/index.ts

...a/templates/simple/nextjs/app/components/chat-section.tsx

...ages/create-llama/templates/simple/nextjs/app/globals.css

...s/create-llama/templates/simple/nextjs/tailwind.config.ts

...emplates/streaming/nextjs/app/components/chat-section.tsx

...mplates/streaming/nextjs/app/components/ui/chat-input.tsx

...emplates/streaming/nextjs/app/components/ui/chat-item.tsx

...s/create-llama/templates/streaming/nextjs/app/globals.css

...reate-llama/templates/streaming/nextjs/tailwind.config.ts

packages/create-llama/templates/types.ts

packages/create-llama/templates/ui/html/chat/chat-avatar.tsx

packages/create-llama/templates/ui/html/chat/chat-input.tsx

packages/create-llama/templates/ui/html/chat/chat-item.tsx

...ges/create-llama/templates/ui/html/chat/chat-messages.tsx

packages/create-llama/templates/ui/html/chat/index.ts

packages/create-llama/templates/ui/shadcn/button.tsx

...ges/create-llama/templates/ui/shadcn/chat/chat-avatar.tsx

...ages/create-llama/templates/ui/shadcn/chat/chat-input.tsx