[ISSUE #409]⚡️Optimize RemotingCommand decode and encode

[mxsm]

Which Issue(s) This PR Fixes(Closes)

Fixes #409

Brief Description

How Did You Test This Change?

[codecov]

Codecov Report

Attention: Patch coverage is 76.08696% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 19.10%. Comparing base (ff0c3c0) to head (82e7582).

Files	Patch %	Lines
...ketmq-remoting/src/codec/remoting_command_codec.rs	83.33%	7 Missing ⚠️
rocketmq-remoting/src/protocol/remoting_command.rs	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #410   +/-   ##
=======================================
  Coverage   19.10%   19.10%           
=======================================
  Files         207      207           
  Lines       13828    13842   +14     
=======================================
+ Hits         2642     2645    +3     
- Misses      11186    11197   +11     

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