feat(compiler): Python bindings (#53)

- feat(compiler): python bindings
- build: update docker image for python bindings
- pin pybind11 to 2.6.2, 2.7 is not having correct include_dirs set (still
a question why?)
- using generated parser/printer

compiler/python/HLFHEModule.cpp

@@ -0,0 +1,27 @@
+#include "DialectModules.h"
+
+#include "zamalang-c/Dialect/HLFHE.h"
+
+#include "mlir-c/BuiltinAttributes.h"
+#include "mlir/Bindings/Python/PybindAdaptors.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/raw_ostream.h"
+
+#include <pybind11/pybind11.h>
+#include <pybind11/pytypes.h>
+#include <pybind11/stl.h>
+
+using namespace zamalang;
+using namespace mlir::python::adaptors;
+
+/// Populate the hlfhe python module.
+void zamalang::python::populateDialectHLFHESubmodule(pybind11::module &m) {
+  m.doc() = "HLFHE dialect Python native extension";
+
+  mlir_type_subclass(m, "EncryptedIntegerType",
+                     hlfheTypeIsAnEncryptedIntegerType)
+      .def_classmethod(
+          "get", [](pybind11::object cls, MlirContext ctx, unsigned width) {
+            return cls(hlfheEncryptedIntegerTypeGet(ctx, width));
+          });
+}