#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.cpp

@@ -0,0 +1,113 @@
+/////////////////////////////////////////////////////////////////////////////////
+//
+//  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.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#include "RimFixedTrajectoryWellPath.h"
+
+#include "Well/RigWellPath.h"
+
+// Make sure to include cafPdmFieldScriptingCapabilityCvfVec3d. Include of general cafPdmFieldScriptingCapability causes unity build issues.
+#include "cafPdmFieldScriptingCapabilityCvfVec3d.h"
+#include "cafPdmObjectScriptingCapability.h"
+#include "cafPdmUiOrdering.h"
+
+CAF_PDM_SOURCE_INIT( RimFixedTrajectoryWellPath, "FixedTrajectoryWellPath" );
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+RimFixedTrajectoryWellPath::RimFixedTrajectoryWellPath()
+{
+    CAF_PDM_InitScriptableObject( "Fixed Trajectory Well Path", ":/Well.svg", "", "FixedTrajectoryWellPath" );
+
+    CAF_PDM_InitScriptableField( &m_trajectoryPoints, "TrajectoryPoints", std::vector<cvf::Vec3d>(), "Trajectory Points" );
+    m_trajectoryPoints.uiCapability()->setUiHidden( true );
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+RimFixedTrajectoryWellPath::~RimFixedTrajectoryWellPath()
+{
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RimFixedTrajectoryWellPath::setTrajectoryPoints( const std::vector<cvf::Vec3d>& wellTargets )
+{
+    m_trajectoryPoints = wellTargets;
+    createWellPathGeometry();
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+std::vector<cvf::Vec3d> RimFixedTrajectoryWellPath::trajectoryPoints() const
+{
+    return m_trajectoryPoints();
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RimFixedTrajectoryWellPath::createWellPathGeometry()
+{
+    if ( m_trajectoryPoints().empty() )
+    {
+        return;
+    }
+
+    // Create well path geometry from the target points
+    std::vector<cvf::Vec3d> wellPathPoints = m_trajectoryPoints();
+    std::vector<double>     measuredDepths;
+
+    // Calculate measured depths along the path
+    double totalMD = 0.0;
+    measuredDepths.push_back( totalMD );
+
+    for ( size_t i = 1; i < wellPathPoints.size(); ++i )
+    {
+        cvf::Vec3d segmentVector = wellPathPoints[i] - wellPathPoints[i - 1];
+        double     segmentLength = segmentVector.length();
+        totalMD += segmentLength;
+        measuredDepths.push_back( totalMD );
+    }
+
+    auto wellPathGeometry = new RigWellPath( wellPathPoints, measuredDepths );
+
+    setWellPathGeometry( wellPathGeometry );
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RimFixedTrajectoryWellPath::defineUiOrdering( QString uiConfigName, caf::PdmUiOrdering& uiOrdering )
+{
+    RimWellPath::defineUiOrdering( uiConfigName, uiOrdering );
+
+    // Hide the well targets field from UI since this is Python-only
+    uiOrdering.skipRemainingFields( true );
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RimFixedTrajectoryWellPath::initAfterRead()
+{
+    createWellPathGeometry();
+}