Add keymap to clean screen

<leader>n to hide signcolumn, line numbers and virtual text

lua/user/keymaps.lua

@@ -99,10 +99,10 @@ keymap("n", "<F17>", "<cmd>lua require'dap'.terminate()<cr>", opts) -- Shift+F5
 --keymap("n", "<leader>di", "<Plug>VimspectorBalloonEval", opts)
 
 -- move.nvim
-vim.keymap.set('n', '<M-j>', ':MoveLine(1)<cr>', opts)
-vim.keymap.set('n', '<M-k>', ':MoveLine(-1)<cr>', opts)
-vim.keymap.set('x', '<M-j>', ':MoveBlock(1)<cr>', opts)
-vim.keymap.set('x', '<M-k>', ':MoveBlock(-1)<cr>', opts)
+keymap('n', '<M-j>', ':MoveLine(1)<cr>', opts)
+keymap('n', '<M-k>', ':MoveLine(-1)<cr>', opts)
+keymap('x', '<M-j>', ':MoveBlock(1)<cr>', opts)
+keymap('x', '<M-k>', ':MoveBlock(-1)<cr>', opts)
 
 -- disable arrow keys
 keymap("n", "<Right>", "<Nop>", opts)
@@ -124,10 +124,19 @@ keymap("i", "<M-h>", "<Left>", opts)
 keymap("i", "<M-j>", "<C-o>gj", opts)
 keymap("i", "<M-k>", "<C-o>gk", opts)
 
--- gitsigns
--- vim.keymap.set('n', '<Leader>hp', '<cmd>Gitsigns preview_hunk<cr>', opts)
--- vim.keymap.set('n', '<Leader>hb', function() gs.blame_line{full=false} end, opts)
--- vim.keymap.set('n', '<Leader>hB', function() gs.blame_line{full=true} end, opts)
+local function clean_screen()
+    vim.o.number = not vim.o.number;
+    --if not vim.diagnostic.get_next() then return end
+    if vim.o.number then
+        vim.diagnostic.show()
+        vim.opt.signcolumn = "yes"
+    else
+        vim.diagnostic.hide()
+        vim.opt.signcolumn = "no"
+    end
+end
+
+keymap("n", "<leader>n", clean_screen, opts)
 
 local function otherkeymaps()
     local ok