nvim: Switch lightspeed to flash

Flash.nvim provides a very tasty remote editing functionality which lightspeed
does not. Otherwise it behaves *mostly* the same. For now, I have the flash
search label functionality activated (default) but if it is annoying I will
turn it off (It injects labels into the normal neovim search. So if you search
a word and want to go directly there, you just press the label key as part
of the search and it jumps there. This might be problematic if I quickly type
something that does not exist but it picks up a non-existent letter as label
instead.)

Otherwise, the remote editing functionality is activated by
<operator>r<label><movement>, such as `yr<label>iw` to yank inside a word
somewhere else and stay at the current position. Similarly for example
`cr<label>$` to change from the label to the end of the line and then jump
back to the original position and so on.

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

@@ -44,7 +44,53 @@ return {
 		},
 	},
 	-- jump between letters with improved fFtT quicksearch, mimics sneak
-	{ "ggandor/lightspeed.nvim", event = "BufEnter" },
+	{
+		"folke/flash.nvim",
+		event = "VeryLazy",
+		opts = {},
+		keys = {
+			{
+				"s",
+				mode = { "n", "x", "o" },
+				function()
+					require("flash").jump()
+				end,
+				desc = "Flash",
+			},
+			{
+				"S",
+				mode = { "n", "x", "o" },
+				function()
+					require("flash").treesitter()
+				end,
+				desc = "Flash Treesitter",
+			},
+			{
+				"r",
+				mode = "o",
+				function()
+					require("flash").remote()
+				end,
+				desc = "Remote Flash",
+			},
+			{
+				"R",
+				mode = { "o", "x" },
+				function()
+					require("flash").treesitter_search()
+				end,
+				desc = "Treesitter Search",
+			},
+			{
+				"<c-s>",
+				mode = { "c" },
+				function()
+					require("flash").toggle()
+				end,
+				desc = "Toggle Flash Search",
+			},
+		},
+	},
 
 	-- personal dict improvements for git sync
 	{ "micarmst/vim-spellsync", event = "VeryLazy" },
@@ -152,5 +198,5 @@ return {
 	-- try to avoid putting files in util buffers, e.g. filetree, aerial, undotree, ..
 	{ "stevearc/stickybuf.nvim", config = true },
 	-- make it a little less painful to open really big (>2mb) files by disabling features
-	{ "LunarVim/bigfile.nvim", lazy = false },
+	-- { "LunarVim/bigfile.nvim", lazy = false },
 }