fix: all: fixes to get emacs-chess working on 30.2

- added lexical-binding headers to all source files
- replaced make-variable-buffer-local with defvar-local throughout source code
- replaced deprecated cl library with cl-lib, including replacing assert with cl-assert to emacs-chess-steps.el
- added proper headers and footers to test files when missing
- populated chess images and chess sounds directory
- fixed defcustom calling directory-files without error handling.
  xboard installation no longer required.

2 files changed, 58 insertions, 0 deletions

diff --git a/pieces b/pieces
deleted file mode 160000
-Subproject e1fd1a04010df93f18ff1c1d8d62ea23ce96029
diff --git a/pieces/xboard/pll49.xpm b/pieces/xboard/pll49.xpm
new file mode 100644
index 0000000..f1668ed
--- /dev/null
+++ b/pieces/xboard/pll49.xpm
@@ -0,0 +1,58 @@
+/* XPM */
+static char *pll49[] = {
+/* columns rows colors chars-per-pixel */
+"49 49 3 1",
+"  c black s dark_piece",
+". c gray s light_square",
+"X c white s light_piece",
+/* pixels */
+".................................................",
+".................................................",
+".................................................",
+".................................................",
+".................................................",
+"......................     ......................",
+"..................... XXXXX .....................",
+".................... XXXXXXX ....................",
+"................... XXXXXXXXX ...................",
+"................... XXXXXXXXX ...................",
+"................... XXXXXXXXX ...................",
+"................... XXXXXXXXX ...................",
+"................... XXXXXXXXX ...................",
+".................... XXXXXXX ....................",
+".....................  XXX  .....................",
+"...................  XXXXXXX  ...................",
+".................. XXXXXXXXXXX ..................",
+"................. XXXXXXXXXXXXX .................",
+"................. XXXXXXXXXXXXX .................",
+"................ XXXXXXXXXXXXXXX ................",
+"................ XXXXXXXXXXXXXXX ................",
+"................ XXXXXXXXXXXXXXX ................",
+"................ XXXXXXXXXXXXXXX ................",
+"................ XXXXXXXXXXXXXXX ................",
+"................. XXXXXXXXXXXXX .................",
+"................. XXXXXXXXXXXXX .................",
+".................. XXXXXXXXXXX ..................",
+"...................  XXXXXXX  ...................",
+".................  XXXXXXXXXXX  .................",
+"................ XXXXXXXXXXXXXXX ................",
+"............... XXXXXXXXXXXXXXXXX ...............",
+".............. XXXXXXXXXXXXXXXXXXX ..............",
+"............. XXXXXXXXXXXXXXXXXXXXX .............",
+"............. XXXXXXXXXXXXXXXXXXXXX .............",
+"............ XXXXXXXXXXXXXXXXXXXXXXX ............",
+"............ XXXXXXXXXXXXXXXXXXXXXXX ............",
+"........... XXXXXXXXXXXXXXXXXXXXXXXXX ...........",
+"........... XXXXXXXXXXXXXXXXXXXXXXXXX ...........",
+"........... XXXXXXXXXXXXXXXXXXXXXXXXX ...........",
+".......... XXXXXXXXXXXXXXXXXXXXXXXXXXX ..........",
+".......... XXXXXXXXXXXXXXXXXXXXXXXXXXX ..........",
+".......... XXXXXXXXXXXXXXXXXXXXXXXXXXX ..........",
+".......... XXXXXXXXXXXXXXXXXXXXXXXXXXX ..........",
+".......... XXXXXXXXXXXXXXXXXXXXXXXXXXX ..........",
+"..........                             ..........",
+".................................................",
+".................................................",
+".................................................",
+"................................................."
+};