refactor: migrate to buf

[fadeev]

• added buf configuration files in proto/
• moved proto directories for modules into zetacore, so proto/crosschain/* becomes proto/zetacore/crosschain/*. This is a good practice and makes the source code compatible with tools like Telescope among other things.
• updated import statements in proto files to match the new directory structure
• switched to a leading dot syntax (fully-qualified name) to resolve some naming conflicts when importing types from other packages
• added scripts/protocgen.sh
• removed third_party/proto as buf handles dependencies.

To compile proto files run ./scripts/protocgen.sh. Currently, without Docker.

[brewmaster012]

hi @fadeev let's get this PR merged soon?

@kingpinXD any pending PRs that might have changed protobuf definitions that may need coordinated PR merge?

I'll be working on a PR that need to change/add protobuf defs, hopefully will be using the new system.

[kingpinXD]

hi @fadeev let's get this PR merged soon?

@kingpinXD any pending PRs that might have changed protobuf definitions that may need coordinated PR merge?

I'll be working on a PR that need to change/add protobuf defs, hopefully will be using the new system.

No , lets go ahead and merge

[fadeev]

If this is ready for merging, @brewmaster012 @kingpinXD please leave a review. Thanks!

[fadeev]

Smoke test is still failing. I think the issue might be in the following.

Before

import (
    _ "github.com/gogo/protobuf/gogoproto"
)

After

import (
    _ "github.com/cosmos/gogoproto/gogoproto"
)

[fadeev]

Superseded by #520