feat: extract financing to it's own table & fix: Finance vehicle menu

[TonybynMp4]

Description

Worked on #30, it shouldn't really cause any problem for backwards compat, maybe a migration would do the job?

Checklist

• I have personally loaded this code into an updated Qbox project and checked all of its functionality.
• My pull request fits the contribution guidelines & code conventions.

[Manason]

Left comments on the migrate.sql only that apply to all the sql. Haven't reviewed lua yet.

I wouldn't repeat the table creation within the migrate.sql.

I think the best strategy here is to leave the player_vehicles table alone to preserve backwards compatibility, but use this new table in qbx_vehicleshop. That way other vehicle shop resources will continue to work by using the other table

[TonybynMp4]

I wouldn't repeat the table creation within the migrate.sql.

migrate.sql should be what people execute if they already had qb / the previous versions of qbx vehicleshop, where import is ONLY used when creating a new server.

I think the best strategy here is to leave the player_vehicles table alone to preserve backwards compatibility, but use this new table in qbx_vehicleshop. That way other vehicle shop resources will continue to work by using the other table

Other resources should have it's own sql file to add those, and since this change would only affect people that use OUR resource they wouldn't be impacted