[BUG] Handle big library 25.000+ games

[Bernhard-Eisele]

Describe the bug
Can't get my full list of games into despressurizer, so after sorting all games 12471 games are unsorted.

To Reproduce

• Local Files: Looks like despressurizer ignores the local data vdf files. It ignores the current cats and hidden games.
• API1, when no API key is given, I get an 500 profile data error => https://steamcommunity.com/profiles/76561198026278913/games?tab=all&xml=1 (Timeout because my library is too big)
• API2: When I add the API key to despressurizer it requests: https://api.steampowered.com/IPlayerService/GetOwnedGames/v1/?key={0}&steamid={1}&include_appinfo=1 , but this API missed 13.471 of my games

Is it possible, for example, to manually copy the https://store.steampowered.com/dynamicstore/userdata/ to a text field and import the data of AppIds from there?