fix(auto highlight): Only update highlight/position if current buffer is attached to a client

lua/symbols-outline/utils/lsp_utils.lua

@@ -0,0 +1,10 @@
+local vim = vim
+
+local M = {}
+
+function M.is_buf_attached_to_lsp(bufnr)
+    local clients = vim.lsp.buf_get_clients(bufnr or 0)
+    return clients ~= nil and #clients > 0
+end
+
+return M