update registers.nvim settings

lua/config/registers-nvim.lua

@@ -0,0 +1,11 @@
+-- do not show empty registers
+vim.g.registers_show_empty_registers = 0
+
+-- register popup window border style
+vim.g.registers_window_border = 'rounded'
+
+-- register popup window width
+vim.g.registers_window_max_width = 80
+
+-- hide registers filled only with whitespace
+vim.g.registers_hide_only_whitespace = 1