Add translation for "1 free level"

[samimsu]

Key: ONE_FREE_LEVEL
English: https://github.com/samimsu/queens-game-linkedin/blob/ce62118ce2e932396ce9294f5d68aef482538693/src/i18n/en.json#L113

[Trystan4861]

Hi, I'm far from pc now, the spanish translation is: "1 nivel gratis"

Last time I checked the language files, I counted... More than 60 missing translations between the different languages... the one with the most blank terms is ar.json

Translators who have Visual Studio Code can use my extension to help them translate JSON files more easily and to check that they do not leave any terms untranslated... Here is the link to the extension in the Visual Studio marketplace

[samimsu]

Wouldn't let me save even though I changed it in the settings, closed the extension, opened it again. I didn't restart vs code though.

[Trystan4861]

Check the local configuration file, it is usually in the .vscode folder... it is the local configuration that is most important and if it has the wrong value... that happens... Also send me an issue to the repo to take a closer look.