chore: add .dir-locals.el for GNU Emacs users

Signed-off-by: Ar Rakin <rakinar2@onesoftnet.eu.org>

Author: virtual-designer

.dir-locals.el

@@ -0,0 +1,14 @@
+((nil . ((fill-column . 80)
+         (indent-tabs-mode . nil)
+         (tab-width . 4)
+		 (require-final-newline t))))
+
+(c-mode . ((c-basic-offset . 4)
+		   (c-default-style . "gnu")
+		   (c-basic-offset . 4)
+		   (c-offsets-alist . ((case-label . +)
+							   (block-open . 0)
+							   (block-close . 0)
+							   (substatement-open . 0)
+							   (brace-list-open . 0)
+							   (brace-list-close . 0)))))