Add isthereanydeal-for-deck v1.0.0

[JtdeGraaf]

IsThereAnyDeal for Deck

A Decky plugin for Steam Deck that shows IsThereAnyDeal data on the Deck's game store pages.

Checklist:

Developer Checklist

• I am the original author or an authorized maintainer of this plugin.
• I have abided by the licenses of the libraries I am utilizing, including attaching license notices where appropriate.

Plugin Checklist

• I have verified that my plugin works properly on the Stable and Beta update channels of SteamOS.
• I have verified my plugin is unique or alternatively provides more/alternative functionality to a similar plugin already on the store.

Plugin Backend Checklist

• No: I am using a custom backend other than Python.
• No: I am using a tool or software from a 3rd party FOSS project that does not have it's dependencies statically linked.
• No: I am using a custom binary that has all of it's dependencies statically linked.

Testing

• Tested on SteamOS Stable/Beta Update Channel.

• Tested on SteamOS Preview Update Channel.

[RodoMa92]

Looks fine to me, good to go to testing.

[RodoMa92]

Works great, thanks! Couple of improvements:

1. If a game is free to play, instead of showing it by default I would just disable showing it up (not sure how you would behave for a temporary free to keep titles, tho. Not sure if Steam JS API has a parameter to check for free to play titles built in).

2. Maybe leave an optional manual setup of the API key for IsThereAnyDeals, otherwise i can see your key to be just rate limited or completely disabled by them.

Still, good job! Would love for something more comprehensive like https://augmentedsteam.com/ but I know how much pain is patching Steam's UI code, so I'm fine even only with this.