Add compression to `DataModel`

[greymistcube]

If human readability of encoded data structure isn't much of a concern, it is possible to encode a DataModel instance to a Bencodex.Types.List instead of Bencodex.Types.Dictionary. With some consideration, it might even be possible to expand on DataModel as implemented in #1935. One way to achieve this would be to order property names by their ordinals before encoding and decoding.

[stale[bot]]

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