[lldb][Docs] Convert platform packets doc to Markdown (#89913)

As before, script did most of the work, hand edits after that.

There's a lot more we can do dedupe this and the packets doc, this will
come in a follow up PR.

GitOrigin-RevId: 51f6570eba69b7030f2845e30b7973bd9ac6c522
3 files changed