Brightness (Windows): uses COM-less method to query WMI

Co-authored-by: Copilot <copilot@github.com>

src/common/windows/wmi.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#include <windef.h>
+#include <wmistr.h>
+#include <assert.h>
+
+/**
+ * The WmiOpenBlock function opens the WMI data block object for the specified WMI class.
+ *
+ * \param Guid Specifies the GUID for WMI class.
+ * \param DesiredAccess Specifies the desired access rights to the data block object.
+ * \param DataBlockHandle Pointer to a memory location where the routine returns a handle to the data block object.
+ * \return ULONG Successful or errant status.
+ */
+NTSYSAPI ULONG NTAPI
+WmiOpenBlock(
+    _In_ LPCGUID Guid,
+    _In_ ACCESS_MASK DesiredAccess,
+    _Out_ PHANDLE DataBlockHandle
+);
+
+/**
+ * The WmiQueryAllDataW function returns all WMI data blocks that implement a given WMI class (Unicode).
+ *
+ * \param DataBlockHandle Handle to a WMI data block object.
+ * \param BufferLength Pointer to a memory location that specifies the size of the buffer.
+ * \param Buffer Pointer to the buffer where the routine returns the WMI data.
+ * \return ULONG Successful or errant status.
+ */
+NTSYSAPI ULONG NTAPI
+WmiQueryAllDataW(
+    _In_ HANDLE DataBlockHandle,
+    _Inout_ PULONG BufferLength,
+    _Out_writes_bytes_opt_(*BufferLength) PVOID Buffer
+);
+
+/**
+ * The WmiCloseBlock function closes a WMI data block object.
+ *
+ * \param DataBlockHandle Handle to the data block object to be closed.
+ * \return ULONG Successful or errant status.
+ */
+NTSYSAPI ULONG NTAPI
+WmiCloseBlock(
+    _In_ HANDLE DataBlockHandle
+);
+
+static inline void ffCloseWmiBlock(HANDLE* hBlock) {
+    assert(hBlock);
+    if (*hBlock) {
+        WmiCloseBlock(*hBlock);
+    }
+}
+
+#define FF_AUTO_CLOSE_WMI_BLOCK __attribute__((cleanup(ffCloseWmiBlock)))
+
+// MOF: https://github.com/tpn/winsdk-10/blob/master/Include/10.0.16299.0/km/wmicore.mof