nvim: Extend snippet capability

Enabled snippet completion from the first letter (allowing single letter
snippet prefixes).
Extended the luasnip usage and added a telescope extension to show all
enabled snippets for the current buffer.

nvim/.config/nvim/lua/plugins/completion.lua

@@ -3,6 +3,7 @@ return {
 	{
 		"hrsh7th/nvim-cmp",
 		branch = "main",
+		version = false,
 		dependencies = {
 			"andersevenrud/cmp-tmux",
 			"cbarrete/completion-vcard",
@@ -19,11 +20,30 @@ return {
 			"kdheepak/cmp-latex-symbols",
 			"lukas-reineke/cmp-rg",
 			"crispgm/cmp-beancount",
-			"ray-x/cmp-treesitter",
-			"saadparwaiz1/cmp_luasnip",
+			{ "ray-x/cmp-treesitter", dependencies = { "nvim-treesitter/nvim-treesitter" } },
 			{
-				"L3MON4D3/LuaSnip",
-				dependencies = { "rafamadriz/friendly-snippets" },
+				"saadparwaiz1/cmp_luasnip",
+				dependencies = {
+
+					{
+						"L3MON4D3/LuaSnip",
+						dependencies = {
+							"rafamadriz/friendly-snippets",
+							{
+								"benfowler/telescope-luasnip.nvim",
+								dependencies = { { "nvim-telescope/telescope.nvim", optional = true } },
+								config = function()
+									require("telescope").load_extension("luasnip")
+								end,
+							},
+						},
+						build = "make install_jsregexp",
+						config = function()
+							require("luasnip.loaders.from_vscode").lazy_load({ exclude = { "markdown", "quarto" } })
+							require("luasnip.loaders.from_snipmate").lazy_load()
+						end,
+					},
+				},
 			},
 		},
 		config = function()
@@ -83,7 +103,7 @@ return {
 					{ name = "otter" },
 					{ name = "nvim_lsp" },
 					{ name = "nvim_lsp_signature_help" },
-					{ name = "luasnip", keyword_length = 2 },
+					{ name = "luasnip", keyword_length = 1 },
 					{ name = "pandoc_references" },
 					{ name = "calc" },
 					{ name = "path" },