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/snippets/norg.lua

@@ -1,24 +0,0 @@
-dofile(core.snippets)
-
-return {
-  -- header level 1, usually this has the same name as the file
-  s("h1", {
-    t("* "),
-    c(1, {
-      f(file_name, {}),
-      i(1, "header")
-    })
-  }),
-
-  -- link snippet
-  s("link", {
-    t("{"),
-    c(1, {
-      sn(nil, { t({":$/"}), i(1, "path to file"), t(":") }),
-      i(1, "https://example.com")
-    }),
-    t("}["),
-    i(2, "description"),
-    t("]")
-  })
-}