nvim: Add scratchpad item to start screen

Added an item to quickly create a scratchpad to the mini.starter
template.

The difference to opening a default empty buffer is that it is seen as
ephemeral (i.e. will not complain if you close vim without saving) and
it sets the default filetype to markdown.

Closes 753ed1f.

nvim/.config/nvim/lua/personal/scratchpad.lua

@@ -6,7 +6,7 @@ appear in the buffer list. Useful for e.g. jotting down quick notes and thoughts
 If called with bang, will replace the current buffer with the scratch
 window, otherwise opens a new split.
 
-The buffer, by default is set to the pandoc filetype.
+The buffer, by default is set to the markdown filetype.
 This can be changed by setting the `g:scratchpad_ft` variable or the `b:scratchpad_ft`
 variable to the intended filetype.
 ]]
@@ -25,9 +25,9 @@ function M.create(split, ft)
 	else
 		split = true
 	end
-	-- which filetype to set for the scratchpad, defaults to pandoc
+	-- which filetype to set for the scratchpad, defaults to markdown
 	if isempty(ft) then
-		ft = vim.b["scratchpad_ft"] or vim.g["scratchpad_ft"] or "pandoc"
+		ft = vim.b["scratchpad_ft"] or vim.g["scratchpad_ft"] or "markdown"
 	end
 
 	local buf = api.nvim_create_buf(false, true)

nvim/.config/nvim/lua/plugins/core.lua

@@ -173,6 +173,11 @@ return {
 				evaluate_single = true,
 				items = {
 					starter.sections.builtin_actions(),
+					{
+						name = "Scratchpad",
+						action = "lua require('personal.scratchpad').create()",
+						section = "Builtin actions",
+					},
 					starter.sections.recent_files(10, true),
 					starter.sections.recent_files(10, false),
 					-- Use this if you set up 'mini.sessions'