nvim: split plugins into multiple files

.config/nvim/lua/plugins/lsp_signature.lua

@@ -0,0 +1,14 @@
+return {
+  -- show function signature while typing
+  {
+    'ray-x/lsp_signature.nvim',
+    opts = {
+      bind = true,
+      handler_opts = {
+        border = "none"
+      },
+      hint_prefix = Hint_sign,
+      hint_scheme = "DiagnosticSignHint"
+    }
+  }
+}