make encode feature public available

[maxxcs]

Currently, it's not possible to access the encode() and decode() methods for Insertion and Deletion even with the features = ["encode"] enabled. This PR aims to resolve this.

[noib3]

Encode and Decode are currently not part of the public API because I plan to eventually remove them.

If you need to convert Insertions and Deletions to/from bytes, you can use their Serialize and Deserialize impls combined with a serde data format that supports binary output (such as bincode).

[maxxcs]

Encode and Decode are currently not part of the public API because I plan to eventually remove them.

If you need to convert Insertions and Deletions to/from bytes, you can use their Serialize and Deserialize impls combined with a serde data format that supports binary output (such as bincode).

Ah, I see. I'll close this PR then.