Injection of manual picked points as tracks

[servantftransperfect]

This pull request introduces a new utility for injecting manually drawn 2D point tracks into the AliceVision pipeline, along with the necessary support for a new "manual" image describer type. The main changes include adding a new command-line tool and node for handling shapes-based tracks, updating the core feature type enumeration, and ensuring proper integration throughout the codebase.

New feature: Manual track injection

• Added a new utility, aliceVision_tracksShapesInjecting, which reads 2D point shapes from a JSON file and outputs them as tracks, supporting use cases where tracks are manually created or annotated. This includes a new entry point (main_tracksShapesInjecting.cpp) and build integration. [1] [2]
• Introduced a new Meshroom node, TracksShapesInjecting, to expose this functionality in the Meshroom UI, allowing users to inject manual tracks as part of their workflow.

Core library and enum updates

• Added a new image describer type, MANUAL, to the EImageDescriberType enum, including string conversion, information display, and a strong support coefficient of 1.0 for robust handling of manual points. [1] [2] [3] [4] [5]
• Updated visualization code to assign the color "white" to manual features for SVG outputs.

Build system

• Integrated the new utility into the build system, ensuring it is compiled and linked with the necessary dependencies.

Minor

• Corrected a comment in the CMake build script for clarity regarding track simulation utilities.