Warnings w/ emacs 28 & native comilation

[ideasman42]

Neotree has the following warnings when compiling.

Warning (comp): neotree.el:201:1: Warning: custom-declare-variable `neo-reset-size-on-open' docstring wider than 80 characters Disable showing Disable logging
Warning (comp): neotree.el:220:1: Warning: custom-declare-variable `neo-mode-line-type' docstring wider than 80 characters Disable showing Disable logging
Warning (comp): neotree.el:232:1: Warning: custom-declare-variable `neo-mode-line-custom-format' docstring wider than 80 characters Disable showing Disable logging
Warning (comp): neotree.el:238:1: Warning: custom-declare-variable `neo-smart-open' docstring wider than 80 characters Disable showing Disable logging
Warning (comp): neotree.el:284:1: Warning: custom-declare-variable `neo-click-changes-root' docstring wider than 80 characters Disable showing Disable logging
Warning (comp): neotree.el:337:1: Warning: custom-declare-variable `neo-confirm-change-root' docstring wider than 80 characters Disable showing Disable logging
Warning (comp): neotree.el:372:1: Warning: custom-declare-variable `neo-confirm-kill-buffers-for-files-in-directory' docstring wider than 80 characters Disable showing Disable logging
Warning (comp): neotree.el:2097:19: Warning: assignment to free variable `list-of-expanded-folders' Disable showing Disable logging
Warning (comp): neotree.el:2097:19: Warning: reference to free variable `list-of-expanded-folders' Disable showing Disable logging
Warning (comp): neotree.el:1269:66: Warning: the function `all-the-icons-icon-for-file' is not known to be defined. Disable showing Disable logging
Warning (comp): neotree.el:1268:45: Warning: the function `all-the-icons-icon-for-dir-with-chevron' is not known to be defined. Disable showing Disable logging
Warning (comp): neotree.el:1212:10: Warning: the function `projectile-project-buffers' is not known to be defined. Disable showing Disable logging

[Abdisalan]

Some of these seem like easy fixes (docstring wider than 80 chars). Marking this as an easy first issue for new contributors