remove floating diagnostics, and add line diagnostics

after/plugin/lsplines.lua

@@ -0,0 +1,13 @@
+local status_ok, lines = pcall(require, "lsp_lines")
+if not status_ok then
+	return
+end
+
+lines.setup {}
+
+vim.diagnostic.config {
+  virtual_lines = {
+    highlight_whole_line = true,
+    only_current_line = true
+  }
+}