## Description
This PR moves all proto files under one dir (`/proto`). The script to generate adding functionality to copy the files that still need to be in the same place. (abci & rpc)
renames every proto package from `tendermint.proto.<pkg_name>` to `tendermint.<pkg_name>`
Removes unneeded types in privval proto directory
Closes: #XXX
* test-vectors for backwards compatibility:
- copy & paste test-vectors from v0.33.5 to ensure
backwards compatibility for vote's SignBytes
* WIP: everything besides time seems to match :-/
* almost
* Found the culprit: field nums weren't consecutive ints ...
* fix order of partset header too
* this last votes-related test can easily be fixed
* some minor changes and fix last failing test
* move proto types back to stdtime, fix various linting
* use libs/protoio
* remvoe commented code
* add comments
* fix tests
* uncomment testscases
* dont ignore error panic
* fix signable test
* fix happy path testing
* fix comment
Co-authored-by: Marko Baricevic <marbar3778@yahoo.com>
