streamline all code and data names

Merged Maria Paniw requested to merge streamline_code_accessibility into develop

Change init_abund_pred_updated.R to initial_abundance_predictions.R and move from functions folder to modeling folder

Change run_predictions_shrubs_updated.R to run_temporal_shrub_forecast.R

Change run_spatial_model_updated.R to run_shrub_model.R

Change run_spatial_predictions_updated.R to run_spatial_shrub_forecast.R

Change run_spatial_predictions_csv_output_example.R to run_spatial_shrub_forecast_csv_output.R

Change coordinates_2023_02.csv to landscape_abund_23-24.csv

(when done, remove the deprecated data name files from data)

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