[server] publish dictionaries and kernel data types

src/plugins/server/data.ml

src/plugins/server/data.mli

src/plugins/server/kernel_ast.ml

src/plugins/server/kernel_main.ml

src/plugins/server/kernel_properties.ml

src/plugins/server/request.ml

src/plugins/server/request.mli

src/plugins/server/syntax.ml

src/plugins/server/syntax.mli