[#231] Prepare releng to 5.0.0
Use git log --follow [file] to see the history before move/rename
- move "SubveriveCommitIntegration" demo project to "demo" subfolder
- move features to "features" subfolder
- move bundles to "bundles" subfolder
- move NL bundles and features to "nls" subfolder
- move test bundles to "tests" subfolder