feat(nvim): phase 3 — replace nvim-cmp with blink.cmp and telescope with snacks.picker

Swap the completion engine to blink.cmp v1.x, dropping nvim-cmp,
its eight cmp-* sources, lspkind, and LuaSnip. Swap the picker
to snacks.picker, removing telescope.nvim and six telescope
extensions. LSP capabilities now sourced from blink.cmp; LSP
navigation keymaps and the colorscheme/keymaps/todo pickers move
to Snacks.picker. friendly-snippets is preserved as blink's
snippet source.

lua/absolute/plugins/blink-cmp.lua

@@ -0,0 +1,9 @@
+return {
+	"saghen/blink.cmp",
+	version = "1.*",
+	event = "InsertEnter",
+	dependencies = { "rafamadriz/friendly-snippets" },
+	config = function()
+		require("absolute.after.blink-cmp")
+	end,
+}

lua/absolute/plugins/nvim-cmp.lua

@@ -1,18 +0,0 @@
-return {
-    'hrsh7th/nvim-cmp',
-    event = "InsertEnter",
-    dependencies = {
-        'neovim/nvim-lspconfig',
-        'hrsh7th/cmp-nvim-lsp',
-        'hrsh7th/cmp-buffer',           --source for text in buffer
-        'hrsh7th/cmp-path',             --source for file system paths
-        'hrsh7th/cmp-cmdline',
-        "saadparwaiz1/cmp_luasnip",     --source for autocompletion
-        "onsails/lspkind.nvim",
-        "L3MON4D3/LuaSnip",             --Snippet Engine
-        "rafamadriz/friendly-snippets", --Useful snippets
-    },
-    config = function()
-        require("absolute.after.nvim-cmp")
-    end
-}

lua/absolute/plugins/snacks.lua

@@ -20,6 +20,13 @@ return {
 				warn = "",
 			},
 		},
-		-- picker added in Phase 3
+		picker = {
+			enabled = true,
+			ui_select = true,
+		},
 	},
+	config = function(_, opts)
+		require("snacks").setup(opts)
+		require("absolute.after.snacks")
+	end,
 }

lua/absolute/plugins/telescope.lua

@@ -1,21 +0,0 @@
-return {
-	"nvim-telescope/telescope.nvim",
-	branch = "0.1.x",
-	dependencies = {
-		"nvim-lua/popup.nvim",
-		"nvim-lua/plenary.nvim",
-		"nvim-telescope/telescope-dap.nvim",
-		"andrew-george/telescope-themes",
-		"nvim-telescope/telescope-media-files.nvim",
-		"nvim-telescope/telescope-file-browser.nvim",
-		{
-			"nvim-telescope/telescope-live-grep-args.nvim",
-			-- This will not install any breaking changes.
-			-- For major updates, this must be adjusted manually.
-			version = "^1.0.0",
-		},
-	},
-	config = function()
-		require("absolute.after.telescope")
-	end,
-}