[llvm] [mlir] [mlir][Python] create MLIRPythonSupport (PR #171775)

[Maksim Levental via llvm-commits]

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@@ -25,6 +25,13 @@
     multiple Python implementations, setting this explicitly to the preferred
     `python3` executable is strongly recommended.
 
+*   **`MLIR_BINDINGS_PYTHON_NB_DOMAIN`**: `STRING`
+
+    nanobind (and MLIR) domain within which extensions will be compiled. 
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makslevental wrote:

done

https://github.com/llvm/llvm-project/pull/171775