[WIP] Ringbuffer with key and export some api for get messages from exchange_client

[RanMaoyi]

Work in process
Need more tests

[codecov]

Codecov Report

Attention: 120 lines in your changes are missing coverage. Please review.

Comparison is base (f6afb2b) 65.64% compared to head (ab05e04) 65.57%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/mqtt/protocol/exchange/exchange_client.c	24.77%	85 Missing ⚠️
src/supplemental/nanolib/ringbuffer/ringbuffer.c	2.85%	34 Missing ⚠️
src/supplemental/nanolib/conf_ver2.c	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #752      +/-   ##
==========================================
- Coverage   65.64%   65.57%   -0.07%     
==========================================
  Files         124      124              
  Lines       35727    35878     +151     
==========================================
+ Hits        23453    23528      +75     
- Misses      12274    12350      +76     

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[RanMaoyi]

thats all?

@JaylinYu Currently, there are still some header file dependency issues that need to be resolved. The main issue is that 'conf.h' includes 'exchange_client.h,' and 'exchange_client.h' has a dependency on 'ringbuffer.h,' which includes 'nng_impl.h.' On the NanoMQ side, including 'nng_impl.h' causes header file path errors. Additionally, there are some test cases that still require confirmation of lock order.