added new charts and update chart script

code/eval/charts/240212_window_size_1500/memgraph.jpg

code/eval/charts/240212_window_size_1500/memgraph.pdf

code/eval/charts/240212_window_size_1500/neo4j.jpg

code/eval/charts/240212_window_size_1500/ongdb.jpg

code/eval/charts/240212_window_size_1500/ongdb.pdf

code/eval/charts/240212_window_size_1500/pg.jpg

code/eval/charts/240212_window_size_2000/memgraph.jpg

code/eval/charts/240212_window_size_2000/memgraph.pdf

code/eval/charts/240212_window_size_2000/neo4j.jpg

code/eval/charts/240212_window_size_2000/neo4j.pdf

code/eval/charts/240212_window_size_2000/ongdb.jpg

code/eval/charts/240212_window_size_2000/ongdb.pdf

code/eval/charts/240212_window_size_2000/pg.jpg

code/eval/charts/240212_window_size_2000/pg.pdf

code/eval/charts/240212_window_size_2500/memgraph.html

code/eval/charts/240212_window_size_2500/memgraph.jpg

code/eval/charts/240212_window_size_2500/memgraph.pdf

code/eval/charts/240212_window_size_2500/neo4j.jpg

code/eval/charts/240212_window_size_2500/neo4j.pdf

code/eval/charts/240212_window_size_2500/ongdb.jpg