refactor(ts-client): replace string literal errors with SdkErrorCode enum#270

Shawnchee wants to merge 3 commits intoMeteoraAg:mainMeteoraAg/dlmm-sdk:mainfrom

Shawnchee:refactor/dlmm-sdk-error-enumShawnchee/dlmm-sdk:refactor/dlmm-sdk-error-enumCopy head branch name to clipboard