nvim: Allow pasting images into markup files

With the new `img-clip.nvim` extension we can copy any image anywhere
and simply paste it into a markdown/quarto/latex/typst/... document with
the right markup already.

Those can be from the web/locally. Also allows drag and drop from e.g.
web pages.

Mapped to `<leader>pp` currently, though we will have to find a better
mapping. Or invoked with `:ImagePaste`.

nvim/.config/nvim/lua/plugins/prose.lua

@@ -1,4 +1,4 @@
-local writing_ft = { "quarto", "pandoc", "markdown", "text", "tex" }
+local writing_ft = { "quarto", "pandoc", "markdown", "text", "tex", "typst" }
 
 local prose_plugs = {
 	-- UI improvements
@@ -69,6 +69,26 @@ local prose_plugs = {
 		ft = writing_ft,
 	},
 
+	-- easy copy paste of images into markup files
+	{
+		"HakonHarnes/img-clip.nvim",
+		event = "VeryLazy",
+		opts = {
+			filetypes = {
+				quarto = {
+					url_encode_path = true,
+					template = "![$CURSOR]($FILE_PATH)",
+					download_images = false,
+				},
+			},
+		},
+		cmd = { "PasteImage" },
+		keys = {
+			{ "<leader>pp", "<cmd>PasteImage<cr>", desc = "Paste image from system clipboard" },
+		},
+		ft = writing_ft,
+	},
+
 	-- bring zettelkasten commands
 	{
 		"mickael-menu/zk-nvim",
@@ -111,6 +131,7 @@ local prose_plugs = {
 			"ZkOrphans",
 		},
 		keys = {
+			-- additional key instpirations https://github.com/al1-ce/MonolithVim/blob/master/after/ftplugin/markdown.lua
 			{ "<leader>ni", "<cmd>edit ~/documents/notes/index.md<cr>", desc = "open index", silent = true },
 			{ "<leader>nn", "<cmd>ZkNotes { sort = { 'modified' } }<cr>", desc = "note list" },
 			{