[RFC][Java] Implement a highly optimized String compressioner

[chaokunyang]

Is your feature request related to a problem? Please describe.

Currently utf8 encoding in jdk are not efficient enough and write it to fury MemoryBuffer needs an extra copy since those encoder return a byte array:

• java.lang.String#encodeUTF8/java.lang.String#encodeUTF8_UTF16
• sun.nio.cs.UTF_8.Encoder#encodeArrayLoop

We need a highly optimized encoder for fury to avoid the cost of string serialization.

Describe the solution you'd like

• Detect latin length first using superword, then encode those chars by latin, encode remaining chars using utf8
• Latin length encoded in coder too, remaining utf8 chars length encoded using varint.

[heliang666s]

hello,I am new in there,please assign me,thanks~