chore: use unbuild to bundle plugins

[antfu]

Changes

• All plugins are now using unbuild to bundle and generate DTS (due to the complexity, leave the bundle of core untouched)
• All plugins are now emitting both CJS and ESM builds, with exports field (probably breaking)
• Migrated plugin-vue-jsx and plugin-legacy to TypeScript
• build-vite, build-plugin-* scripts are removed. pnpm run build uses pnpm's recursive runs to build them together.
• patchEsbuildDist is removed in favor of patchCJS
• build for plugins no longer deps on Vite's build
• add a top-level dev script to run all watch build at once.

[sapphi-red]

@antfu Was it ok to merge this? (in case, didn't notice the auto-merge)

[antfu]

I guess it should be fine :)

[bluwy]

Also partially reviewed this yesterday and it looks good as well.

[bompus]

I believe this broke @vitejs/plugin-vue@3.0.0-alpha.0 for me. I'm looking at the dist/index.mjs file and tryRequire and other calls are still using require(), but require isn't available in ESM, which causes the tryRequire call to fail.

I'm using vite.config.js inside a project where package.json is using "type": "module", node v18.2.0

Error: Failed to resolve vue/compiler-sfc.
@vitejs/plugin-vue requires vue (>=3.2.25) to be present in the dependency tree.
    at resolveCompiler (file:///cms/node_modules/.pnpm/@vitejs+plugin-vue@3.0.0-alpha.0_tmmodkd2szetyztewt3aaxwddq/node_modules/@vitejs/plugin-vue/dist/index.mjs:12:11)

Previous working → New non-working:

@vitejs/plugin-legacy  1.8.2  →  2.0.0-alpha.0     
@vitejs/plugin-vue     2.3.3  →  3.0.0-alpha.0     
vite                   2.9.9  →  3.0.0-alpha.1

[sapphi-red]

@bompus Thanks for the report. plugin-*@*.0.0-alpha.1 has been released which includes the fix.