nvim: Check if code evaluation maps set before overriding

If we already have <lleader>cc/cx mappings set before we come to set
them for markdown filetypes we will not override them.

nvim/.config/nvim/lua/plugins/data_analysis.lua

@@ -144,7 +144,7 @@ return {
 						":noautocmd :MoltenEnterOutput<cr>",
 						{ silent = true, desc = "show output" }
 					)
-					map("n", "<localleader>cP", function()
+					map("n", "<localleader>cx", function()
 						vim.cmd("MoltenHideOutput")
 						vim.cmd("MoltenDelete")
 					end, { silent = true, desc = "hide output" })