#12569 Python: Add API for creating well paths from XYZ coordinates

Add import_fixed_trajectory_well_path() method to WellPathCollection that enables
creation of well paths from coordinate lists in Python. Implements feature request
for programmatic well path creation without file-based imports.

- Add RimFixedTrajectoryWellPath class for coordinate-based well paths
- Add GRPC interface for coordinate data transfer via key-value store
- Add comprehensive Python API with input validation and error handling
- Add example script importing well on Norne.
- Add 7 unit tests covering all functionality and edge cases

The API allows creating well paths like:
well_path = collection.import_fixed_trajectory_well_path(
    name="MyWell",
    coordinates=[[x1,y1,z1], [x2,y2,z2], ...]
)

ApplicationLibCode/ProjectDataModel/WellPath/RimFixedTrajectoryWellPath.h

@@ -0,0 +1,52 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2025     Equinor ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "RimWellPath.h"
+
+#include "cafPdmField.h"
+#include "cafPdmFieldCvfVec3d.h"
+
+#include "cvfVector3.h"
+
+#include <vector>
+
+//==================================================================================================
+///
+//==================================================================================================
+class RimFixedTrajectoryWellPath : public RimWellPath
+{
+    CAF_PDM_HEADER_INIT;
+
+public:
+    RimFixedTrajectoryWellPath();
+    ~RimFixedTrajectoryWellPath() override;
+
+    void                    setTrajectoryPoints( const std::vector<cvf::Vec3d>& wellTargets );
+    std::vector<cvf::Vec3d> trajectoryPoints() const;
+
+    void createWellPathGeometry();
+
+private:
+    void defineUiOrdering( QString uiConfigName, caf::PdmUiOrdering& uiOrdering ) override;
+    void initAfterRead() override;
+
+private:
+    caf::PdmField<std::vector<cvf::Vec3d>> m_trajectoryPoints;
+};