feat: add toggle to show/hide diagnostics

Author: guru245

init.lua

@@ -559,6 +559,9 @@ require('lazy').setup({
           --  For example, in C this would take you to the header.
           map('grD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
 
+          -- Toggle to show/hide diagnostic messages
+          map('<leader>td', function() vim.diagnostic.enable(not vim.diagnostic.is_enabled()) end, '[T]oggle [D]iagnostics')
+
           -- The following two autocommands are used to highlight references of the
           -- word under your cursor when your cursor rests there for a little while.
           --    See `:help CursorHold` for information about when this is executed