mappings: SPC w write to file

`SPC w` starts the `:write` command and waits for the user to enter the
file name at the prompt

The prompt has file name completion

Author: practicalli-johnny

mappings.lua

@@ -12,6 +12,10 @@ return {
     -- second key is the lefthand side of the map
     ["<leader><tab>"] = { "<cmd>b#<cr>", desc = "Last tab" },
 
+    -- Save prompting for file name
+    ["<leader>W"] = { ":write ", desc = "Save as file" },
+
+
     -- mappings seen under group name "Buffer"
     ["<leader>b"] = { name = "Buffers" },
     ["<leader>bn"] = { "<cmd>tabnew<cr>", desc = "New tab" },