bump to v0.6

Author: Zhuoming Chen

.gitignore

@@ -292,7 +292,9 @@ RLG/
 scripts/
 vortex_torch/kernels/centroid_score
 
-# Local source-tree clones (flashinfer / flash-attention) used for reference;
-# not part of this repo. Anchored so only the root-level dirs are ignored.
+# Local source-tree clones (flashinfer / flash-attention / cpu_kernels) used
+# for reference; not part of this repo. Anchored so only the root-level dirs
+# are ignored.
 /flashinfer/
-/flash-attention/
+/flash-attention/
+/cpu_kernels/