Add 4x4-4x7 Breakthrough WDL tablebases

SHA256SUMS

@@ -1,2 +1,6 @@
 32bf26760b318c578c21c537c14414e6fccd3a8facc09fd1828dbddb5cd130b0  breakthrough-5x6-wdl.tar.zst
 85b6cd24a3aaeb04827733e40a7f0a6bdc06393a9cfdc8b1cf48c82f06e2a581  breakthrough-6x5-wdl.tar.zst
+7119e87c3445b780ab8b7fd5450c054d5353035ecc6162d36537bfd0a93794da  breakthrough-4x4-wdl.tar.zst
+74580a6c9d04e18bc307d3731b55e091638688251b938b9f0adf110777239b59  breakthrough-4x5-wdl.tar.zst
+cd47e739bb3c7e70a56d30cdd43606e59cdb2b49f686f6e8a4bc2f9ccbe45b3a  breakthrough-4x6-wdl.tar.zst
+159c3ab016f19c5eadce2ecb58b71d1a6590f112640b6240a8eaae28c93ef8d2  breakthrough-4x7-wdl.tar.zst

breakthrough-4x4-wdl.tar.zst

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breakthrough-4x5-wdl.tar.zst

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breakthrough-4x6-wdl.tar.zst

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breakthrough-4x7-wdl.tar.zst

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