Rename schemes.

.gitlab-ci.yml

.vscode/cSpell.json

.vscode/settings.json

README.md

src/b-plus-tree/Options.cs

src/b-plus-tree/README.md

src/b-plus-tree/Tree.cs

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

src/benchmark/Primitives.cs

src/benchmark/Program.cs

src/benchmark/Schemes.cs

src/benchmark/benchmark.csproj

src/cli/Commands/Protocol.cs

src/cli/Commands/PureScheme.cs

src/cli/Commands/Simulation.cs

src/cli/cli.csproj

src/crypto/README.md

src/crypto/bclo-ope/BCLO.cs

src/crypto/bclo-ope/bclo-ope.csproj

src/crypto/cjjjkrs-sse/CJJJKRS.cs