feat(client/main): checkImmune function.

[Randolio]

] Replace all ipairs loops with the checkImmune function, returning a boolean.

] Combine returns inside lockpick event and utilize checkImmune to block lockpicking vehicles specified in Config.ImmuneVehicles.

• Have you personally loaded this code into an updated qbcore project and checked all it's functionality? [yes]
• Does your code fit the style guidelines? [yes]
• Does your PR fit the contribution guidelines? [yes]

[Randolio]

Closing to make a new PR with a whole client side refactor.