`ques_pre_trajectory` function

Description This function is designed to calculate land use and land cover change trajectories. It takes as input land cover data and administrative zone information. The function first calculates a trajectory map, which represents the changes in land use and land cover over a specified period.
Process: It creates a cross-tabulation, or contingency table, of land cover types and administrative zones. This table provides a detailed breakdown of the distribution of land cover types across different administrative zones, allowing for a granular understanding of land use patterns.
Output: the function visualizes the trajectory data in the form of a bar chart. This plot provides a clear and concise visual representation of the changes in land use and land cover over time, making it easier to identify trends and patterns.

To do list

Update the plot_bar_trajectory function to accommodate both deforestation and degradation trajectories.
Develop a function that summarizes land cover change trajectories by planning unit. This function should:
- Accept key raster inputs (lc_t1_, lc_t2_, admin_), key table inputs (lookup_traj_reclass, lookup_trajectory_complete), and key column inputs (trajectory, def).
- Generate key raster outputs (map_trajectory, map_deforest_degrad).
- Return a table and a bar plot for each planning unit.