[FEATURE] Measurement tool in 3D map view (#30299)

[QGIS-feature-tracker]

Original commit: https://github.com/qgis/QGIS/commit/edd921c428dc70f955379385ced85002dca1054c by wonder-sk

• Add measurement tool bar.

• Add class for measure line.

• Get coordinate of clicked point.

• Add clicked point to string line.

• Store clicekd points to layer.

• Try to render the measurement line.

• Render the measurement line (with some problems).

• Store points in vector.

• Make identify and measure tool exlusive to each other.

• Add measurement dialog.

• Fix only one action must active.

• Some code suggestion from Martin.

• Revert code to show the line.

• Show segment length and the total.

• Implement close dialog means restart 3d measurement.

• Add new button.

• Add unit combo box.

• Fix shadowing private member of class.

• Add slot to combo box unit changes.

• Hide ellipsoid and cartesian radio button.

• Add measure line for QgsPoint.

• Add unit changes feature.

• Add help (pointed to 2D measurement tool).

• Add finish measurement using right click.

• Remove keypress event, it does not make sense.

• Add remove-last-point with middle button.

• Add crsChanged event.

• Remove confusing tooltip.

• Add pan (camera control) action tool for clear state of 3d map tool.

• Change 3D identify tool cursor.

• Fix distance 2D to 3D.

• Remove unclear method.

• Add unit test for measureLine3D.

• Add 3D measurement setting.

• Add header.

• Make extra 3D renderers refresh the scene when they are updated

• update the 3D renderer every time the measurement line layer is modified

• Set Altitude clamping to absolute.

• Remove options for 3D measurement line.

• Remove help button in 3D measurement dialog.

• Merge duplicate code for handle clicked position.

• Use color for 3d measure line from 2d one.

• Remove unneeded reimplementation method.

• Remove 2D canvas reference.

• Unify update measurement layer.

Use local variable for feature and line

• Create measurement layer once.

• Use data provider to change the geometry.

• Add length3D for QgsLineString.

• Simplify distance calculation and presentation. Remove QgsDistanceArea measurement.

• Descaled z value based on the terrain vertical scale.

• Remove line when tool is deactivated.

• Enable changing the line color from setting, but after re-activation.

• Update color of measurement line after saving option.

• Remove debug message.

• Remove 3D length calculation from distancearea.

• Handle 2D case for length3D, more unit test, and docstring.

• Fix typos.

• Addressing Martin's and Nyall's review.

• Remove setMeasurement to avoid confussion.

[lajunek]

@DelazJ @havatv @SrNetoChan I will describe this feature in the PR for issue #4154

[lajunek]

@hatav @DelazJ created a new branch for describing the measurement tool

[lajunek]

@havatv @ghtmtt @SrNetoChan @DelazJ I think we can close this issue