feat(plugins): Add file tree, Enable Lazy loading

I've tried to lazy load most the plugins to improve start up time.
It has been greatly reduced, from more than 600ms to just around 100ms

Bug: Line that shows up when you are inside a block(block-line) doesn't
have color.

lua/kickstart/settings.lua

@@ -36,5 +36,9 @@ vim.o.timeoutlen = 300
 -- Set completeopt to have a better completion experience
 vim.o.completeopt = 'menuone,noselect'
 
--- NOTE: You should make sure your terminal supports this
-vim.o.termguicolors = true
+-- disable netrw at the very start of your init.lua for Nvim-tree plugin
+vim.g.loaded_netrw = 1
+vim.g.loaded_netrwPlugin = 1
+
+-- set termguicolors to enable highlight groups
+vim.opt.termguicolors = true