feat(vite-plugin-blocklet): support show poweredby in html loading [release-minor]

[lancelot-lewis]

Relates Issue

Main changes

1. support show logo skeleton
2. support show poweredby text
3. support hide animation dots

Screenshots

show logo skeleton & poweredby text

Check list

• Project create by create-blocklet can work with npm run dev
• Project create by create-blocklet can work with npm run deploy
• Project create by create-blocklet can work with npm run upload
• If a new version need to be publish, make sure you have run npm run bump-version command