Add packages example.

.gitlab-ci.yml

src/b-plus-tree/b-plus-tree.csproj

src/ore-schemes/README.md

src/ore-schemes/cjjjkrs-sse/cjjjkrs-sse.csproj

src/ore-schemes/cjjkrs-sse/cjjkrs-sse.csproj

src/ore-schemes/cryptdb-ope/cryptdb-ope.csproj

src/ore-schemes/fh-ope/fh-ope.csproj

src/ore-schemes/lewi-ore/lewi-ore.csproj

src/ore-schemes/practical-ore/practical-ore.csproj

src/ore-schemes/shared/shared.csproj

tools/packages-example/ORE.cs

tools/packages-example/Primitives.cs

tools/packages-example/Program.cs

tools/packages-example/SSE.cs

tools/packages-example/packages-example.csproj

version.txt