fix: add ReplacePlaylistItems, which uses the new endpoint

fixes #1040

fix: add ReplacePlaylistItems, which uses the new endpoint

fixes #1040

feat: add playlist create method without userId

chore: use `dotnet nuget push` instead of `nuget`

Fix unused directives (Need a commit hook for that...)

Only parse JSON when content-type is set to JSON

fix release workflow

bump install version

fix build: switch from hub to gh cli

chore: also ignore outdated SDK in tests