Refactoring: Rename Language to LanguageServerId

This resolves a long-standing naming issue in Serena & SolidLSP.

scripts/print_language_list.py

@@ -2,10 +2,10 @@
 Prints the list of supported languages, for use in the project.yml template
 """
 
-from solidlsp.ls_config import Language
+from solidlsp.ls_config import LanguageServerId
 
 if __name__ == "__main__":
-    lang_strings = sorted([l.value for l in Language])
+    lang_strings = sorted([l.value for l in LanguageServerId])
     max_len = max(len(s) for s in lang_strings)
     fmt = f"%-{max_len + 2}s"
     for i, l in enumerate(lang_strings):