Aart van Baren

- [x] Support `__sponsor_extension` tag - [x] Support `Microsoft.VisualStudio.Code.SponsorLink` resource - [ ] Add namespace page to webui - [ ] Add namespace configuration to webui (description, website links, social...

> to add a select input in footer so the user can select his/her preferred editor. And then, build the urls for that editor. I think it's better to add...

> I've already enabled compression at the spring level on production with [EclipseFdn/open-vsx.org@adfde55](https://github.com/EclipseFdn/open-vsx.org/commit/adfde558e8aafd6453b8bdd47144f9d2f3eb0183). Will this have an impact? Ok, then this PR only contains a few minor improvements. Can you...

@akosyakov No, compression was already enabled in EclipseFdn/open-vsx.org.

@akosyakov @filiptronicek I've reduced this PR to only setting `Content-Type: application/xml` for the `/sitemap.xml` endpoint.

@akosyakov Yes, that's going to be a bit of a challenge. We need some sort of diff functionality. @spoenemann Is this a desirable feature for the Open VSX server?

@akosyakov The `/api/{namespace}/{extension}` endpoint returns that data, e.g. https://open-vsx.org/api/redhat/vscode-yaml The `reviewsUrl` field points to an endpoint to retrieve all reviews. The `downloadCount` and `averageRating` fields contain the stats. The question...

> Is there a way to put them in via API? Not really. There's an endpoint to post a review, but it uses authentication to determine the user that posted...

### TODO - [x] Sync extension versions - [x] Only process metadata when publishing, don't upload files to cloud storage. - [x] Sync extension download count - [x] Disable download...

@jeanp413 > // TODO(ak) we cannot just publish extensions we need to respect correpsonding flags like pre-release or target // prepackaged extension does not allow to configure it, so we...