MAJOR: Project rename and preparation for v1.0.0

I hope I haven't missed any for the renames!

lua/outline/folding.lua

@@ -0,0 +1,27 @@
+local M = {}
+local cfg = require 'outline.config'
+
+M.is_foldable = function(node)
+  return node.children and #node.children > 0
+end
+
+local get_default_folded = function(depth)
+  local fold_past = cfg.o.symbol_folding.autofold_depth
+  if not fold_past then
+    return false
+  else
+    return depth >= fold_past
+  end
+end
+
+M.is_folded = function(node)
+  if node.folded ~= nil then
+    return node.folded
+  elseif node.hovered and cfg.o.symbol_folding.auto_unfold_hover then
+    return false
+  else
+    return get_default_folded(node.depth)
+  end
+end
+
+return M