fix: add Elixir (.ex, .exs) file extension support in language parser

This commit adds the missing case for Elixir file extensions (.ex and
.exs) in the
loadRequiredLanguageParsers function, fixing the "Unsupported Language"
error when
using the read_file tool with Elixir files. All tests pass, confirming
proper Elixir
support.

Author: Friedrich Pfitzmann

src/services/tree-sitter/languageParser.ts

@@ -27,6 +27,7 @@ import {
 	zigQuery,
 	embeddedTemplateQuery,
 	elispQuery,
+	elixirQuery,
 } from "./queries"
 
 export interface LanguageParser {
@@ -196,6 +197,11 @@ export async function loadRequiredLanguageParsers(filesToParse: string[]): Promi
 				language = await loadLanguage("elisp")
 				query = language.query(elispQuery)
 				break
+			case "ex":
+			case "exs":
+				language = await loadLanguage("elixir")
+				query = language.query(elixirQuery)
+				break
 			default:
 				throw new Error(`Unsupported language: ${ext}`)
 		}