Initial #403 (comment)

Align with Vite (preparing for Vite Lib)

• Add logLevel option: https://vite.dev/config/shared-options.html#loglevel
• Add customLogger option: https://vite.dev/config/shared-options.html#customlogger

If there are multiple configs with different logger option,

• Keep current logger as global logger
• If no logLevel & customLogger option, fallbacks to global one
• Otherwise, new a logger or use customLogger for that build.
• Add logger to ResolvedConfig