Make pack methods public for BigIntegerPoint and HalfFloatPoint

[prudhvigodithi]

Description

Following this commit 94c76c7 make pack methods public for BigIntegerPoint and HalfFloatPoint.

Please let me know if there’s any restriction in sandbox packages that requires methods to be non-public.

Example (with IntPoint) with public pack we can directly use as follows

IntPoint.pack(new int[] { l }).bytes,
IntPoint.pack(new int[] { u }).bytes,

Without pack

// Create byte array
byte[] lowerPoint = new byte[HalfFloatPoint.BYTES];
byte[] upperPoint = new byte[HalfFloatPoint.BYTES];
// Encode value into bytes
HalfFloatPoint.encodeDimension(l, lowerPoint, 0);
HalfFloatPoint.encodeDimension(u, upperPoint, 0);

Once this PR is merged we can:

HalfFloatPoint.pack(new int[] { l }).bytes,
HalfFloatPoint.pack(new int[] { u }).bytes,

[github-actions]

This PR does not have an entry in lucene/CHANGES.txt. Consider adding one. If the PR doesn't need a changelog entry, then add the skip-changelog label to it and you will stop receiving this reminder on future updates to the PR.

[prudhvigodithi]

I have just updated the CHANGES.txt adding to 10.2.2, please let me know if this is ok else I can change back to 10.3.0.

[jpountz]

I'm good with the change, but I'd put the change in 10.3 instead of 10.2.2 since it's a new feature rather than a bug fix.

[prudhvigodithi]

Thanks Adrien, updated the CHANGES.txt moving to 10.3.0.
@getsaurabh02

[prudhvigodithi]

Just pushed a commit to fix the conflicts. @jpountz a gentle follow up to see if we are ok to merge this change.
Thanks