Replace rollup-plugin-license with rolldown-license-plugin (#37130)

Replace `rollup-plugin-license` and `wrap-ansi` with
[`rolldown-license-plugin`](https://github.com/silverwind/rolldown-license-plugin),
a zero-dependency plugin with async parallel I/O and built-in word
wrapping.

- Removes `rollup-plugin-license` (pulls in `lodash`, `moment`) and
`wrap-ansi` from the dependency tree
- License build time reduced by ~40% (370ms vs 640ms)
- Added e2e test for `licenses.txt`

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: Claude (Opus 4.6) <noreply@anthropic.com>

build/generate-go-licenses.go

@@ -19,6 +19,7 @@ import (
 
 // regexp is based on go-license, excluding README and NOTICE
 // https://github.com/google/go-licenses/blob/master/licenses/find.go
+// also defined in vite.config.ts
 var licenseRe = regexp.MustCompile(`^(?i)((UN)?LICEN(S|C)E|COPYING).*$`)
 
 // primaryLicenseRe matches exact primary license filenames without suffixes.