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/qld49.xpm b/pieces/xboard/qld49.xpm
new file mode 100644
index 0000000..d02280d
--- /dev/null
+++ b/pieces/xboard/qld49.xpm
@@ -0,0 +1,58 @@
+/* XPM */
+static char *qld49[] = {
+/* columns rows colors chars-per-pixel */
+"49 49 3 1",
+"  c black s dark_piece",
+". c green s dark_square",
+"X c white s light_piece",
+/* pixels */
+".................................................",
+".................................................",
+".................................................",
+".......................   .......................",
+"...........    ....... XXX .......    ...........",
+".......... XXXX ...... XXX ...... XXXX ..........",
+".......... XXXX ...... XXX ...... XXXX ..........",
+".......... XXXX ....... X ....... XXXX ..........",
+"..   ......  X ......... ......... X  ......   ..",
+". XXX ....... .......... .......... ....... XXX .",
+". XXX .......  ........ X ........  ....... XXX .",
+". XXX .......  ........ X ........  ....... XXX .",
+".. X ........  ........ X ........  ........ X ..",
+"...  ........ X ....... X ....... X ........  ...",
+"....  ....... X ....... X ....... X .......  ....",
+".....  ...... XX ..... XXX ..... XX ......  .....",
+".....  ...... XX ..... XXX ..... XX ......  .....",
+"..... X ..... XX ..... XXX ..... XX ..... X .....",
+"..... X ..... XXX .... XXX .... XXX ..... X .....",
+"..... XX .... XXX .... XXX .... XXX .... XX .....",
+"..... XXX ... XXX ... XXXXX ... XXX ... XXX .....",
+"...... XX ... XXXX .. XXXXX .. XXXX ... XX ......",
+"...... XXX .. XXXX .. XXXXX .. XXXX .. XXX ......",
+"...... XXX .. XXXXX . XXXXX . XXXXX .. XXX ......",
+"...... XXXX . XXXXX . XXXXX . XXXXX . XXXX ......",
+"...... XXXXX  XXXXX  XXX XXX  XXXXX  XXXXX ......",
+"....... XXXX  XX  XX XX X XX XX  XX  XXXX .......",
+"....... XX XX X XX     XXX     XX X XX XX .......",
+".......   X    XXXXXXXXXXXXXXXXXXX    X   .......",
+"....... XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX .......",
+"........ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX ........",
+"......... XXXXXXXXXXXXXXXXXXXXXXXXXXXXX .........",
+"......... XXXXXX                 XXXXXX .........",
+"..........      XXXXXXXXXXXXXXXXX      ..........",
+".......... XXXXXXXXXXXXXXXXXXXXXXXXXXX ..........",
+"........... XXXXXXXXXXXXXXXXXXXXXXXXX ...........",
+"........... XXXXXXXXXXXXXXXXXXXXXXXXX ...........",
+"........... XXX                   XXX ...........",
+"...........    XXXXXXXXXXXXXXXXXXX    ...........",
+".......... XXXXXXXXXXXXXXXXXXXXXXXXXXX ..........",
+".......... XXXXX                 XXXXX ..........",
+".........       XXXXXXXXXXXXXXXXX       .........",
+"........  XXXXXXXXXXXXXXXXXXXXXXXXXXXXX  ........",
+"........  XXXXXXXXXXXXXXXXXXXXXXXXXXXXX  ........",
+"..........      XXXXXXXXXXXXXXXXX      ..........",
+"................                 ................",
+".................................................",
+".................................................",
+"................................................."
+};