fix: add LINK_DIRECTORIES for GeographicLib in LtsCoordTrans

- Add LINK_DIRECTORIES() to properly link GeographicLib
- Apply to library, tools, and test targets
- Fixes undefined reference errors during DEB package build

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/Lts/Common/LtsCoordTrans/CMakeLists.txt

@@ -27,6 +27,7 @@ if (GeographicLib_FOUND)
     PRIVATE ${GeographicLib_LIBRARIES}
   )
   TARGET_INCLUDE_DIRECTORIES(LtsCoordTrans PRIVATE ${GeographicLib_INCLUDE_DIRS})
+  LINK_DIRECTORIES(${GeographicLib_LIBRARY_DIRS})
 else()
   message(STATUS "GeographicLib not found; building LtsCoordTrans without it")
 endif()
@@ -72,6 +73,7 @@ IF(TARGET LtsCoordTrans)
       ${GeographicLib_LIBRARIES}
     )
     TARGET_INCLUDE_DIRECTORIES(${_tool} PRIVATE ${GeographicLib_INCLUDE_DIRS})
+    LINK_DIRECTORIES(${GeographicLib_LIBRARY_DIRS})
     NGL_INSTALL_TARGET(${_tool})
   ENDFOREACH()
 ENDIF()
@@ -95,5 +97,6 @@ IF(BUILD_TESTING AND TARGET LtsCoordTrans)
     ${GeographicLib_LIBRARIES}
   )
   TARGET_INCLUDE_DIRECTORIES(lts_coord_trans_unit_test PRIVATE ${GeographicLib_INCLUDE_DIRS})
+  LINK_DIRECTORIES(${GeographicLib_LIBRARY_DIRS})
   ADD_TEST(NAME lts_coord_trans_unit_test COMMAND $<TARGET_FILE:lts_coord_trans_unit_test>)
 ENDIF()