feat(diagnostics): show diagnostics source when more than one source is reporting diagnostics

lua/lazyvim/plugins/lsp/init.lua

@@ -21,7 +21,11 @@ return {
       diagnostics = {
         underline = true,
         update_in_insert = false,
-        virtual_text = { spacing = 4, prefix = "●" },
+        virtual_text = {
+          spacing = 4,
+          source = "if_many",
+          prefix = "●",
+        },
         severity_sort = true,
       },
       -- Automatically format on save