v0.34.0

• Move buf check lint to buf lint.
• Move buf check breaking to buf breaking.
• Move buf check ls-lint-checkers to buf config ls-lint-rules.
• Move buf check ls-breaking-checkers to buf config ls-breaking-rules.
• Move protoc-gen-buf-check-lint to protoc-gen-buf-lint.
• Move protoc-gen-buf-check-breaking to protoc-gen-buf-breaking.
• Add buf beta config init.

All previous commands continue to work in a backwards-compatible manner, and the previous protoc-gen-buf-check-lint and protoc-gen-buf-check-breaking binaries continue to be available at the same paths, however deprecation messages are printed.