[batching] slice_scatter

[kshitij12345]

Reference: #240

Note: Draft PR (not ready for review)

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@64a62ca). Click here to learn what that means.
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@@          Coverage Diff          @@
##             main   #290   +/-   ##
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  Files           ?      0           
  Lines           ?      0           
  Branches        ?      0           
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  Hits            ?      0           
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[Chillee]

LGTM!