feat: Expand highlighted languages (#3891)

Adds Elixir, Kotlin, and Swift to the list of available languages to be highlighted.

shared/editor/plugins/Prism.ts

@@ -11,12 +11,14 @@ export const LANGUAGES = {
   css: "CSS",
   clike: "C",
   csharp: "C#",
+  elixir: "Elixir",
   go: "Go",
   markup: "HTML",
   objectivec: "Objective-C",
   java: "Java",
   javascript: "JavaScript",
   json: "JSON",
+  kotlin: "Kotlin",
   mermaidjs: "Mermaid Diagram",
   perl: "Perl",
   php: "PHP",
@@ -26,6 +28,7 @@ export const LANGUAGES = {
   rust: "Rust",
   sql: "SQL",
   solidity: "Solidity",
+  swift: "Swift",
   typescript: "TypeScript",
   yaml: "YAML",
 };