Add neovim config with kickstart-modular. Update shell configs.

config/nvim/lua/lazy-bootstrap.lua

@@ -0,0 +1,16 @@
+-- [[ Install `lazy.nvim` plugin manager ]]
+--    See `:help lazy.nvim.txt` or https://github.com/folke/lazy.nvim for more info
+local lazypath = vim.fn.stdpath 'data' .. '/lazy/lazy.nvim'
+if not (vim.uv or vim.loop).fs_stat(lazypath) then
+  local lazyrepo = 'https://github.com/folke/lazy.nvim.git'
+  local out = vim.fn.system { 'git', 'clone', '--filter=blob:none', '--branch=stable', lazyrepo, lazypath }
+  if vim.v.shell_error ~= 0 then
+    error('Error cloning lazy.nvim:\n' .. out)
+  end
+end
+
+---@type vim.Option
+local rtp = vim.opt.rtp
+rtp:prepend(lazypath)
+
+-- vim: ts=2 sts=2 sw=2 et