[core] add BCD versions of QMK Version (#25804)

Co-authored-by: Joel Challis <git@zvecr.com>

lib/python/qmk/util.py

@@ -3,9 +3,12 @@
 import contextlib
 import multiprocessing
 import sys
+import re
 
 from milc import cli
 
+TRIPLET_PATTERN = re.compile(r'^(\d+)\.(\d+)\.(\d+)')
+
 maybe_exit_should_exit = True
 maybe_exit_reraise = False
 
@@ -96,3 +99,10 @@ def parallel_map(*args, **kwargs):
         # before the results are returned. Returning a list ensures results are
         # materialised before any worker pool is shut down.
         return list(map_fn(*args, **kwargs))
+
+
+def triplet_to_bcd(ver: str):
+    m = TRIPLET_PATTERN.match(ver)
+    if not m:
+        return '0x00000000'
+    return f'0x{int(m.group(1)):02d}{int(m.group(2)):02d}{int(m.group(3)):04d}'