tree 7afd61004d1cb30f85610b24363686b1d8ac86cd
parent 6a625a627536388912380adbf88084ba8dd4f115
author Eric Salo <salo@google.com> 1664162382 -0700
committer Copybara-Service <copybara-worker@google.com> 1664162417 -0700

move (most of) the json code into its own subdir

Continuing the trend of giving individual build targets their own subdirs
where appropriate, and leaving behind temporary stub headers for compatibility.

JSON is a particularly good choice for this because of how little interaction
it has with the rest of upb.

PiperOrigin-RevId: 476792865