Change the package base name of the Go code, from
`git.blender.org/flamenco` to `projects.blender.org/studio/flamenco`.
The old location, `git.blender.org`, has no longer been use since the
[migration to Gitea][1]. The new package names now reflect the actual
location where Flamenco is hosted.
[1]: https://code.blender.org/2023/02/new-blender-development-infrastructure/
The flamenco.io website moves to flamenco.blender.org!
This commit updates the Makefile as follows:
- Rename 'site' to 'project-website', so the new command to deploy is
'make project-website'
- Move the website directory from 'flamenco-io-site' to
'project-website'
- Update the rsync command do reflect the new deployment destination
