add diffview pluging and tweaked code actions mapping

init.lua

@@ -355,7 +355,7 @@ require('lazy').setup({
 
           -- Execute a code action, usually your cursor needs to be on top of an error
           -- or a suggestion from your LSP for this to activate.
-          map('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction', { 'n', 'x' })
+          map('<leader>ac', vim.lsp.buf.code_action, 'Code [Ac]tion', { 'n', 'x' })
 
           -- WARN: This is not Goto Definition, this is Goto Declaration.
           --  For example, in C this would take you to the header.