Migrate build system from Rollup+Babel to tsdown and switch to PNPM#116

ZeeCoder with Copilot wants to merge 4 commits into

masterZeeCoder/use-resize-observer:masterfrom

copilot/migrate-build-system-to-tsdownZeeCoder/use-resize-observer:copilot/migrate-build-system-to-tsdownCopy head branch name to clipboard