e6221c5f0e
Fix two omissions from #19973 that prevented `twenty-sdk/billing` from being a fully exported subpath: - `package.json`: add `billing` to `typesVersions` (every other subpath was listed; billing was the only one missing, breaking type resolution for consumers using classic TS moduleResolution). - `project.json`: add the billing vite build and `dist/billing` output to the `build:sdk` target