kitchen sink...

just gonna put the changes that I can remember making here:
 - replace blink with native completion (omnifunc)
 - remove some unneeded plugins
 - add a misc function for making sure complex bindings don't cause
   flickering
 - remove some stale snippets
 - remove folding (I don't find myself folding that often)

lua/core/init.lua

@@ -29,7 +29,6 @@ end
 
 local M = {
   misc = require("core.misc"),
-  folding = require("core.folding"),
   lsp = require("core.lsp"),
   color = require("core.color"),
   snippets = vim.fs.joinpath(vim.fn.stdpath("config"), "lua/core/snippets.lua"),