Port stock market from Delta-V

[EpicToastTM]

Adds the StockTrading cartridge from Delta-V (DeltaV-Station/Delta-v#2103). It starts installed on quartermaster and cargo technician PDAs (sorry salvage), and the cartridge can be found in the quartermaster's locker. The app requires cargo access to use and prices update every five minutes.

Admins can also add custom companies or change stock values themselves with addstockscompany and changestockprice.

Changelog
🆑EpicToast

• add: Add the StockTrading cartridge. Starts installed on QM and cargo tech PDAs and can be found in the QM's locker.

[hivehum]

scope creep can you make the cartridge a thief target

edit: also i dont really love using dollar signs to denote spesos. can you use a different thing. § like simoleons

[EpicToastTM]

hell yea (to both of those)

[EpicToastTM]

wahhhh my linter

[hivehum]

im sorry but this sprite is kind of fucking ugly

[mqole]

looks good... once the tag is added to the cartridge we can merge
happy to make a custom sprite for the thingy
is the whitespace still sucks? yamllinter seems happy

EDIT OH im a moron who cant view edited commits. ok. please wait warmly

[mqole]

ACTUAL CHANGES

accessibility: could you give the 'amount' bar a default value of 1?

please also add basecargocontraband to the stocktrading cartridge

[EpicToastTM]

i'm a little worried that the purpose of the amount field isn't clear anymore, but here's those changes

lg2m, the changes are made