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/bld49.xpm b/pieces/xboard/bld49.xpm
new file mode 100644
index 0000000..ff734f0
--- /dev/null
+++ b/pieces/xboard/bld49.xpm
@@ -0,0 +1,58 @@
+/* XPM */
+static char *bld49[] = {
+/* 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 ......................",
+"..................... XXXXX .....................",
+"..................... XXXXX .....................",
+"...................... XXX ......................",
+".......................   .......................",
+"......................  X  ......................",
+"..................... XXXXX .....................",
+"...................  XXXXXXX  ...................",
+".................. XXXXXXXXXXX ..................",
+"................. XXXXXXXXXXXXX .................",
+"................ XXXXXXXXXXXXXXX ................",
+"............... XXXXXXXXXXXXXXXXX ...............",
+".............. XXXXXXXXX XXXXXXXXX ..............",
+".............. XXXXXXXXX XXXXXXXXX ..............",
+"............. XXXXXXXXXX XXXXXXXXXX .............",
+"............. XXXXXXXXXX XXXXXXXXXX .............",
+"............. XXXXXX         XXXXXX .............",
+"............. XXXXXXXXXX XXXXXXXXXX .............",
+"............. XXXXXXXXXX XXXXXXXXXX .............",
+"............. XXXXXXXXXX XXXXXXXXXX .............",
+"............. XXXXXXXXXX XXXXXXXXXX .............",
+".............. XXXXXXXXXXXXXXXXXXX ..............",
+".............. XXXXXXXXXXXXXXXXXXX ..............",
+"............... XXXXXXXXXXXXXXXXX ...............",
+"............... XXXXXXXXXXXXXXXXX ...............",
+"................ XX           XX ................",
+"................   XXXXXXXXXXX   ................",
+"................ XXXXXXXXXXXXXXX ................",
+"................ XXXXXXXXXXXXXXX ................",
+"................ XXXXXXXXXXXXXXX ................",
+"...............                   ...............",
+"............... XXXXXXXXXXXXXXXXX ...............",
+".............. XXXXXXXXXXXXXXXXXXX ..............",
+"..............    XXXXXXXXXXXXX    ..............",
+"..................             ..................",
+"......................  X  ......................",
+"....................  XXXXX  ....................",
+"........            XXXX XXXX            ........",
+".....   XXXXXXXXXXXXXX  .  XXXXXXXXXXXXXX   .....",
+".... XXXXXXXXXXXXXXX  .....  XXXXXXXXXXXXXXX ....",
+".... XXX            .........            XXX ....",
+"....    .................................    ....",
+".................................................",
+".................................................",
+"................................................."
+};