docs: add font generation commands to builtin font headers (#547)

Cherry-picked from upstream PR #547

lib/EpdFont/scripts/fontconvert.py

@@ -270,9 +270,17 @@ for index, glyph in enumerate(all_glyphs):
     glyph_data.extend([b for b in packed])
     glyph_props.append(props)
 
-print(f"/**\n * generated by fontconvert.py\n * name: {font_name}\n * size: {size}\n * mode: {'2-bit' if is2Bit else '1-bit'}\n */")
-print("#pragma once")
-print("#include \"EpdFontData.h\"\n")
+print(f"""/**
+ * generated by fontconvert.py
+ * name: {font_name}
+ * size: {size}
+ * mode: {'2-bit' if is2Bit else '1-bit'}
+ * Command used: {' '.join(sys.argv)}
+ */
+#pragma once
+#include "EpdFontData.h"
+""")
+
 print(f"static const uint8_t {font_name}Bitmaps[{len(glyph_data)}] = {{")
 for c in chunks(glyph_data, 16):
     print ("    " + " ".join(f"0x{b:02X}," for b in c))