feat: vite frontend pages build

[storycraft]

1. Moves frontend pages to separated packages named @tosu/pages, setup Vite build system.
2. Integrate frontend build artifacts with existing codebase.
3. Remove and move assets from @tosu/server to @tosu/pages.
4. Remove minified vue(3.5.4) and replace it with vue(3.5.24) package.
5. Add html encoding meta.
6. Fix assets path in htmls.
7. Remove dependencies and script for building and minify scss in @tosu/server.
8. Remove remaining tsc build in @tosu/updater
9. Fix run:dev not showing pages correctly since feat: remove build steps for internal packages #528.
10. Bump node version from 20.11 to 20.19 for min vite node requirement.

This is prerequisites for rewriting frontend in issue

• tosu! roadmap #472

For assets, internal assets are located in assets directory and public files are located in public. You may access them via @assets and @public.

Existing js codes for frontend are still excluded from eslint target. No code changes except vue import.

[storycraft]

@KotRikD I cannot bump ci node version because I don't have permission to edit ci files.