Imports of package proxy

PathSynopsis
github.com/tetratelabs/wazero
github.com/tetratelabs/wazero/apiPackage api includes constants and interfaces used by both end-users and internal implementations.
github.com/tetratelabs/wazero/experimentalPackage experimental includes features we aren't yet sure about.
github.com/tetratelabs/wazero/experimental/logging
github.com/tetratelabs/wazero/internal/leb128
github.com/tetratelabs/wazero/internal/testing/binaryencoding
github.com/tetratelabs/wazero/internal/wasm