[server] fixed documentation readme pages

src/plugins/eva/api/general_requests.ml

src/plugins/eva/api/values_request.ml

src/plugins/metrics/metrics_pivot.ml

src/plugins/server/doc/ast.md

src/plugins/server/doc/kernel.md

src/plugins/server/doc/project.md

src/plugins/server/doc/server.md

src/plugins/server/doc/server_batch.md

src/plugins/server/doc/server_socket.md

src/plugins/server/doc/server_zmq.md

src/plugins/server/kernel_main.ml

src/plugins/server/package.ml

src/plugins/server/server_doc.ml

src/plugins/studia/studia_request.ml