Add files to .gitignore

Author: ufechner7

.gitignore

@@ -33,3 +33,7 @@ hooks
 .idea
 Manifest-v1.11.toml.default
 results/TUDELFT_V3_KITE/polars/tutorial_testing_stall_model_n_panels_54_distribution_SPLIT_PROVIDED.pdf
+data/ram_air_kite/ram_air_kite_foil_cd_polar.csv
+data/ram_air_kite/ram_air_kite_foil_cl_polar.csv
+.gitignore
+.gitignore