deprecate old profiler in favor of snacks.profiler

Use PROF=1 env variable to enable startup profiling

lua/config/profiler.lua

@@ -0,0 +1,23 @@
+--- @module "config.profiler"
+--- This module configures the profiler for the Neovim configuration.
+--- This tool can be used to profile specific modules or all modules.
+---
+--- The profiler can be toggled with the leader keybinding `d<f1>`
+--- or with the `PROF` environment variable.
+--          ╭─────────────────────────────────────────────────────────╮
+--          │                        PROFILER                         │
+--          ╰─────────────────────────────────────────────────────────╯
+
+if vim.env.PROF then
+  -- example for lazy.nvim
+  -- change this to the correct path for your plugin manager
+  local snacks = vim.fn.stdpath('data') .. '/lazy/snacks.nvim'
+  vim.opt.rtp:append(snacks)
+  require('snacks.profiler').startup({
+    startup = {
+      event = 'VimEnter', -- stop profiler on this event. Defaults to `VimEnter`
+      -- event = "UIEnter",
+      -- event = "VeryLazy",
+    },
+  })
+end