feat(providers): Add Riot Games RSO Provider

[ArkShocer]

☕️ Reasoning

Adding Riot Games RSO Provider. Tested it with the current stable next-auth version 4.24.7 on nextjs 14.2.3

🧢 Checklist

• [x] Documentation
• [x] Tests
• [x] Ready to be merged

🎫 Affected issues

📌 Resources

• Security guidelines
• Contributing guidelines
• Code of conduct
• Contributing to Open Source

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Name	Status	Preview	Comments	Updated (UTC)
auth-docs	❌ Failed (Inspect)			May 15, 2024 1:00pm

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| Name | Status | Preview | Comments | Updated (UTC) | | :--- | :----- | :------ | :------- | :------ | | **next-auth-docs** | ⬜️ Ignored ([Inspect](https://vercel.com/authjs/next-auth-docs/Cdo8dayfLwvNcfLHAzqsEYrzr8ST)) | [Visit Preview](https://next-auth-docs-git-fork-arkshocer-providers-rso-authjs.vercel.app) | | May 15, 2024 1:00pm |

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