Identify audio stream languages

[Tyrrrz]

Closes #845

Copilot reviewed 5 out of 12 changed files in this pull request and generated no suggestions.

Files not reviewed (7)

• YoutubeExplode.Tests/StreamSpecs.cs: Evaluated as low risk
• YoutubeExplode.Tests/TestData/VideoIds.cs: Evaluated as low risk
• YoutubeExplode/Bridge/IStreamData.cs: Evaluated as low risk
• YoutubeExplode/Videos/Streams/MuxedStreamInfo.cs: Evaluated as low risk
• YoutubeExplode/Videos/Streams/StreamClient.cs: Evaluated as low risk
• YoutubeExplode/Common/Language.cs: Evaluated as low risk
• YoutubeExplode/Bridge/DashManifest.cs: Evaluated as low risk

Comments skipped due to low confidence (2)

YoutubeExplode/Utils/Extensions/JsonExtensions.cs:28

• [nitpick] The method name 'GetBooleanOrNull' could be more descriptive. Consider renaming it to 'TryGetBoolean' to align with common naming conventions.

public static bool? GetBooleanOrNull(this JsonElement element) =>

YoutubeExplode/Bridge/PlayerResponse.cs:255

• Ensure that the SubstringUntil method handles cases where the delimiter is not found to avoid potential unintended behavior.

?.SubstringUntil(".");