Add property language to filespace

Author: intitni

Core/Sources/CopilotService/LanguageIdentifierFromFilePath.swift

@@ -219,7 +219,7 @@ let fileExtensionToLanguageId = {
     return dict
 }()
 
-func languageIdentifierFromFileURL(_ fileURL: URL) -> LanguageIdentifier? {
+public func languageIdentifierFromFileURL(_ fileURL: URL) -> LanguageIdentifier? {
     let fileExtension = fileURL.pathExtension
     return fileExtensionToLanguageId[fileExtension]
 }

Core/Sources/Service/Workspace.swift

@@ -13,6 +13,7 @@ final class Filespace {
     }
 
     let fileURL: URL
+    private(set) lazy var language: String = languageIdentifierFromFileURL(fileURL)?.rawValue ?? "plaintext"
     var suggestions: [CopilotCompletion] = [] {
         didSet { lastSuggestionUpdateTime = Environment.now() }
     }