fix(guide): simplify directory structure

guide/english/elixir/lists/index.md

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+---
+title: Lists
+---
+## Lists
+
+In Elixir, lists are data structures comprised of values within square brackets. The values in a list can be any type.
+```elixir
+iex> [1, "string", true]
+[1, "string", true]
+```
+
+## Immutability
+
+Data structures in Elixir are immutable, so any operations performed on a List will return a new list, leaving the original intact.
+```elixir
+iex> list = [1, "string", true]
+[1, "string", true]
+iex> list ++ [2]
+[1, "string", true, 2]
+iex> list
+[1, "string", true]
+```
+
+## Heads and Tails
+
+The head (first element) of a list and the tail (remaining values) can easily accessed with the `hd/1` and `tl/1` operators.
+```elixir
+iex> list = [1, "string", true]
+iex> hd(list)
+1
+iex> tl(list)
+["string", true]
+```
+
+#### More Information:
+* [elixir-lang.org | recursion](https://elixir-lang.org/getting-started/basic-types.html#linked-lists)
+* [hexdocs | Enum](https://hexdocs.pm/elixir/List.html)